The Brief

This story was produced by the nonprofit journalism publication Capital & Main in partnership with ProPublica’s Local Reporting Network.  It is co-published with permission. Read part one and part two of the investigation into L.A.’s residential hotels.

As part of Mayor Karen Bass’ signature homelessness initiative called Inside Safe, the city of Los Angeles awarded Las Palmas Hotel a contract potentially worth about $2 million to temporarily shelter people living on the streets.

But the 62-unit hotel in Hollywood was already supposed to be providing housing for people who couldn’t afford to live anywhere else under a 2008 city law meant to ease a “housing emergency” that has grown more severe in the past 15 years.

Inside Safe participants now fill most of Las Palmas’ rooms at nightly rates of up to $140, according to the hotel’s contract with the city — more than double the amount Las Palmas would likely earn if long-term residents rented the rooms as that law requires.

Las Palmas is one of eight residential hotels that have received contracts over the past year to house homeless people through the new Inside Safe program, a Capital & Main and ProPublica investigation found. Of those, five hotels including Las Palmas have collected city funding despite seemingly violating the housing ordinance by offering rooms to tourists.

L.A.’s struggle to preserve low-income housing while simultaneously trying to shelter the growing number of people living on the streets represents an increasingly common national problem as city leaders wrestle with the competing needs of different populations amid a limited housing supply.

Residential hotels, which offer basic single rooms sometimes with shared bathrooms, have long been a kind of last-resort housing for low-income, older and disabled people. The 2008 law bars landlords from turning their buildings into condos or tourist hotels unless they build new units or pay an equivalent fee to the city’s Affordable Housing Trust Fund.

Altogether, at least 18 residential hotels have turned into interim shelters through various homeless services programs since 2016, according to a review of the Los Angeles Housing Department’s residential hotel list, Inside Safe contracts, state awards for housing construction and a Los Angeles Homeless Services Authority database of interim housing sites.

Now, that number is set to grow as dozens more residential hotels could become temporary shelters. On Nov. 1, citing a “desperate need for interim housing,” Bass issued an executive order that allows Inside Safe or similar programs to use the city’s 16,000 residential hotel rooms in 300 buildings during the city’s declared homelessness emergency as long as the rooms are unoccupied.

Turning such permanent housing into temporary shelters only makes the city’s housing problems worse, said Barbara Schultz, director of housing justice at the Legal Aid Foundation of Los Angeles.

“It is inconceivable to me that the city would reduce the number of permanent units affordable to low-income people when we are in the middle of this ginormous housing crisis,” Schultz said.

Bass’ press secretary Clara Karger said in an email that the mayor’s office decided that temporary housing is a better use of the rooms given LA’s housing crisis.

“It is troubling that residential hotels were being misused for daily rates and short-term vacation rentals,” she wrote. “Now, many of those rooms are being used to urgently bring people inside and save lives, and the mayor has directed the Housing Department to address enforcement and to conduct a comprehensive review of all residential hotels.”

This summer, Capital & Main and ProPublica reported that the Housing Department had done little to enforce the residential hotel law as 21 properties openly offered rooms to tourists on travel websites. Following a request by the mayor’s office, Housing Department managers investigated and issued citations to the owners of 17 hotels, including Las Palmas.

Pankaj Naik, CEO of Shivay Hospitality, which operates the hotel, declined to comment or answer questions. Las Palmas has appealed its citation and joined other hotels in a federal lawsuit against the city, alleging that residential hotel enforcement violates their constitutional protection against unreasonable searches. The owners also argue the city has given them tacit approval for short-term rentals by accepting nightly hotel tax payments. The lawsuit is ongoing.

The Housing Department told the mayor that with additional resources, the agency could “stop rogue property owners from violating the Residential Hotel Ordinance and undermining the availability of affordable housing stock.”

But now Bass’ office has removed hundreds of those same residential hotel rooms from the permanent housing market. And the Housing Department’s enforcement hasn’t stopped the city from giving the hotels hundreds of thousands of dollars in taxpayer money. Las Palmas’ Inside Safe contract expires in mid-November, but it provides for a six-month extension.

Patricia Harrold, an 80-year-old pianist at Miceli’s, a landmark Hollywood restaurant, has lived at Las Palmas for 29 years.

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Under Inside Safe, which Bass launched shortly after taking office in December, city staffers target tent cities under bridges or on sidewalks. Outreach workers offer motel rooms while buses stand by to ferry those who accept the offers to their temporary dwellings. Once the encampment residents are gone, sanitation workers break up the camps, toss trash and hose down sidewalks.

The pressure on city leaders to bring people inside from street encampments is “immense,” said Gregg Colburn, a University of Washington real estate professor who studies homelessness. Currently, 46,000 Angelenos live in cars, tents and makeshift shelters, and Bass promised to find housing for 17,000 of them in her first year.

“The problem with that strategy,” Colburn said, “is it doesn’t end homelessness. It recharacterizes it from unsheltered into sheltered, which is why I and many others argue we need a lot more permanent housing.”

Housing enforcement, then lucrative contracts

The Housing Department is supposed to approve any conversion of residential hotel buildings from permanent housing, but department records for 10 of the hotels obtained by Capital & Main and ProPublica didn’t show that permission was obtained to turn the hotels into temporary shelters.

The Housing Department did not provide all the hotel files that the newsrooms requested. It also didn’t respond to an interview request or answer emailed questions about whether it had cleared the hotels and what procedures they have for Inside Safe. Instead, the agency said it would handle the queries as a public records request.

Housing Department records revealed that inspectors had cited two of the Inside Safe properties for residential hotel violations in recent years. Hotel booking websites showed three others were openly renting rooms to tourists against Housing Department rules shortly before signing contracts with the city.

Las Palmas is a prime example. The hotel for years advertised its central location for travelers visiting Hollywood, capitalizing on its fame as the site of the final scene in the movie Pretty Woman.

The final scene in the movie “Pretty Woman” was filmed on Las Palmas’ fire escape.

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The Housing Department had designated Las Palmas as a residential hotel in 2011. It based its decision, in the Las Palmas case and others, on the state’s legal definition of a residential hotel: a building of six or more units that are the primary residences of their guests. During the period analyzed in 2005, hotel tax records showed that 93% of its occupants were permanent residents.

But as tenants moved away or died, the struggling actors, writers and celebrity impersonators who called Las Palmas home watched as their landlord turned more and more of the units into tourist rooms. The hotel’s website features a photo of the lobby with a mural of “Pretty Woman” stars Richard Gere and Julia Roberts reuniting on the building’s fire escape. The website promises visitors a “wonderful holiday” and a “blissful stay.”

Today, only about a dozen permanent residents remain, according to residents and the latest rent registry filed with the Housing Department.

As rents have soared, Las Palmas is the only housing most can afford, said writer John Bucher, 72. He got his third-floor room at the hotel 12 years ago “when there was still a payphone in the lobby.” Bucher has driven for Uber and DoorDash to supplement his income and can count on his adult kids to help him in an emergency. But for his neighbors, the hotel “is their safety net,” he said. “They’ll die here.”

John Bucher, a 72-year-old writer, has lived at Las Palmas for 12 years. Over time, more and more rooms have been rented to tourists as residents have moved away or died.

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As Las Palmas turned into a tourist hotel, it did little to hide its marketing efforts. Outside was a large sign offering “DAILY” and “WEEKLY” rentals. A housing inspector even snapped a photo of it in 2019, potential evidence that the hotel was violating the residential hotel law. But there’s no indication the inspector asked about the sign or followed up to ensure the hotel wasn’t being rented to tourists. And Las Palmas wasn’t cited under the ordinance until this summer, a few months after receiving the Inside Safe contract.

That wasn’t the case for two other hotels that similarly landed Inside Safe agreements: the Top Hat Motel and the Central Inn in South Los Angeles. The Housing Department cited both hotels in recent years for advertising to tourists in violation of the residential hotel law.

But in both cases, the hotels’ attorney wouldn’t allow inspectors to reenter without administrative warrants. Housing Department enforcement records show no evidence that inspectors obtained warrants, and no further enforcement action was taken.

Yet even that knowledge of violations didn’t prevent the city from awarding them Inside Safe contracts.

Neither of the owners of the Top Hat or the Central Inn returned phone calls seeking comment, and the Top Hat’s owners didn’t respond to an email. One of the Top Hat’s owners, Dipakkumar Patel, said at an appeal hearing that he would lose “everything” if he were unable to continue short-term rentals at the hotel. The hotel also joined the civil rights lawsuit against the city.

The Top Hat brought in nearly a half million dollars between late March and the beginning of October through Inside Safe, while the Central Inn earned more than $200,000 from May to September, according to invoices the motels submitted to the city’s administrative officer.

Stealing permanent housing

By turning residential hotels into temporary shelters, Bass may be working against her ultimate goal of transitioning people to permanent homes, housing experts said.

While Bass reported in September that about 17,000 people had moved to motels, traditional shelters or tiny home villages since she took office, only 2,235 had found permanent homes. For Inside Safe, just 190 of the nearly 1,700 participants had landed a permanent place to live as of mid-October. The city’s administrative officer, Matt Szabo, has told the City Council that there is not enough staff to help people find housing and also a shortage of affordable housing.

Inside Safe isn’t the first time the city has allowed residential hotels to be turned into temporary shelters. It’s unclear whether prioritizing getting people off the streets over preserving permanent housing was a deliberate policy choice or simple bureaucratic oversight: the result of well-intentioned housing policies from different eras colliding.

Eight other residential buildings have been pressed into service as temporary housing since 2016 through Los Angeles County or U.S. Veterans Affairs programs for emergency shelter or mental health and drug and alcohol treatment, or as part of the COVID-19 public health response.

Additionally, the state Housing and Community Development agency granted Los Angeles County and two nonprofit groups $19.3 million in Project Homekey funds to acquire and remodel two other residential hotel buildings to use as interim housing.

Schultz, the legal aid attorney, said it is a “mind-bogglingly terrible strategy” to use residential hotels as temporary housing because the ordinance provides such strong legal protection for their preservation — at least on paper. Residential hotels are the city’s only housing that can’t legally be demolished or converted to another use unless the housing is replaced, Schultz said.

The 72-room Highland Gardens, a midcentury modern hotel in Hollywood, highlights the tension between the city’s need for temporary shelter and its equally pressing need for permanent housing. Formerly known as the Landmark Motor Hotel, it is best known as the place where singer Janis Joplin died of a heroin overdose more than 50 years ago.

Highland Gardens had been designated as a residential hotel in 2009 but for years had also advertised its rooms to tourists. Then when local officials needed temporary housing to stop the spread of COVID-19 in homeless shelters, the hotel received a contract under Project Roomkey, paid for with federal pandemic relief funds.

Highland Gardens’ owner didn’t return phone messages left at the hotel.

By the time the program ended in December 2022, few participants had found permanent homes, and City Councilmember Nithya Raman pushed to keep Highland Gardens open as an interim housing site. She said she didn’t know it was a residential hotel.

“That’s part of the problem with the city is that we have such an ad hoc process for finding interim housing,” Raman said. Before Bass took office, Raman said, council offices took the lead in finding sites. “I personally would speak to the owner of this facility to tell them about the program and convince them that there would be benefits for them,” she said.

Raman’s colleagues backed her request, and now a $6 million contract, in effect until mid-2025, includes nearly $4 million to rent the hotel’s rooms and about $2 million for social services for people who had been living on the street. At just $50 per room per night, it’s a more favorable deal for the city than the Inside Safe hotels have negotiated.

Raman said she doesn’t think using the Highland Gardens for temporary housing is a mistake, given the urgent need for shelter. “It has saved lives,” she said.

Tommy Lachenmyer, 36, who moved into Las Palmas through Inside Safe after a fire ripped through a Hollywood encampment near where he slept this year, said the temporary housing has been “a blessing.” But while he’s found a job at Pizza Hut and is studying at a local film school for a career in music production, his quest for stable housing may be harder.

Lachenmyer revisits the location where he once lived in a tent on Vista Del Mar Avenue in Los Angeles.

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Lachenmyer said he filled out an application for permanent housing when he moved in about six months ago. He’s still waiting for approval before he can begin his housing search and said he holds out hope that his stay at the hotel will lead to permanent housing. As for the long wait, Lachenmyer said, “I’m OK with it. People have waited for years.”

But longtime resident Bucher said he is not as optimistic that his new Inside Safe neighbors will find permanent housing.

“All they’re doing is warehousing people,” he said. “Nobody thinks about anything but getting them off the streets.”

A federal judge has now granted Paramount’s settlement agreement with 12 states that sued over the company’s takeover of Warner Bros. Discovery, allowing the companies to soon close their $81 billion mega merger.

In a Wednesday order, U.S. District Judge Araceli Martínez-Olguín ruled that the proposed consent decree was a “fair, reasonable, and good faith approach to address the competitive harms” alleged by the states’ lawsuit. Paramount previously called the antitrust challenge the last hurdle ahead of closing its Warner merger, and signaled that it aims to close its Warner acquisition as soon as early October.

Shortly after Martínez-Olguín’s ruling on Wednesday afternoon, the company announced that Ynon Kreiz — current chief executive at toy giant Mattel — will join Paramount on Oct. 5 and serve as co-CEO alongside David Ellison of the combined company.

A Paramount-Warner marriage will bring together two of Hollywood’s last five legacy studios. HBO Max, a library full of titles including “Harry Potter” and cable networks such as CNN will also find themselves under the same roof with CBS, the likes of the “Top Gun” franchise and the Paramount+ streaming service.

Top prosecutors from 12 states — led by California Attorney General Rob Bonta — sued in July with an initial goal of blocking the merger altogether. They alleged a Paramount-Warner combo would “extinguish competition” and lead to fewer choices for consumers, particularly movie theatergoers and cable customers.

Last week, the states agreed to settle these claims through new commitments from Paramount, including pledges to increase film production in the U.S. over the next five years, commit millions of dollars to a fund aimed at supporting workers displaced by the merger and establish new editorial monitoring of CNN and CBS.

When announcing the deal on Sept. 21, Bonta said the settlement was about “protecting people’s careers, the lives they’ve built here in California, the livelihoods their families rely on,” while maintaining it was not a vote of support for the merger.

Many critics of the tie-up, however, quickly decried the deal as capitulating to corporate pressure and said the proposed terms were too weak. Martínez-Olguín didn’t greenlight the terms right away — maintaining at a hearing on Thursday that the court isn’t merely a “rubber stamp” on a settlement of this kind and that she, like many others, still had questions.

The judge granted outside critics of the settlement — including members of the Block The Merger coalition and the League of United Latin American Citizens — a brief window to share their opposition with the court through amicus briefs. She also instructed Paramount and the settling states to respond to a letter from Democratic Sen. Cory Booker, who called for a more thorough review of the deal.

By Wednesday’s order, however, she concluded that the hopes for settlement terms to go further “do not rise to the level of legal violations upon which the Court can reject the parties’ negotiated resolution.”

The Block the Merger coalition on Wednesday maintained the settlement was a “toothless” deal.

“Allowing the Paramount Skydance-Warner Bros. Discovery merger to move forward with no meaningful structural remedies will cost jobs, mute creativity, weaken independent journalism, and damage our First Amendment rights,” Block the Merger said in a statement. But, the coalition added, “if there is one discernible benefit to the approval of this corporate takeover, it’s that people are now wide awake and paying attention –- and their anger is not going to fade away.”

The Writers Guild of America, which had filed its own suit shortly after the states in July, also reached a settlement agreement with Paramount last week — concluding that it couldn’t continue its legal fight alone.

This story first appeared on The LA Local.

Inglewood is staring down the barrel of a $30.8 million budget deficit next year, the city’s largest in at least two decades, but officials said locals don’t need to be worried. 

Inglewood’s budget ballooned after SoFi Stadium opened in 2020. City officials roughly doubled their spending from the general fund — the pot of money that pays for basic services from police to parks. 

Revenue also boomed in the first few years after the stadium’s opening, but since then hasn’t quite kept up with what’s been spent. 

City officials downplayed the projected deficit last week, saying in reports and presentations that reserves of more than $150 million will cover the gap this year and that they expect increased tax and other revenues to help take care of the problem in the future.  Mayor James Butts said locals have no reason to worry, and that the city’s reserves have enabled officials to be ambitious in their planning. 

Whether they have to dip into those savings at all depends on how locals vote for a ballot measure on Nov. 3. Officials predict Measure AT could wipe out the deficit entirely by bringing in as much as $45 million to $50 million extra in taxes on tickets to major events.

But_, if Inglewood continues to spend more than it takes in over the coming years and pulls too much out of its reserves, city officials could be pushed to lay off staff and cut funding for services, as they did during a fiscal crisis 15 years ago.

The City Council approved the budget proposal in a 4-0 vote at its Tuesday meeting. Councilmember Eloy Morales Jr. was absent.

Here’s a breakdown of Inglewood’s budget

Inglewood’s annual general fund revenue has grown by about $100 million over the last 10 years, driven in large part by increased property taxes and admissions tax.

But that growth has plateaued over the last five years, while expenditures continued to grow. The city plans to spend $279 million out of its general fund this year, more than double its annual spending prior to 2020.

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The city’s total budget is $675 million. It includes the general fund as well as special funds that pay for things like major construction projects and affordable housing.

Police take the largest bite out of Inglewood’s general fund, followed by the public works and parks departments.

Outside the general fund, the city has also budgeted $239 million for capital projects.

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Some of Inglewood’s largest sources of general fund revenue are property tax, sales tax and admissions tax. 

Property tax revenue has grown by leaps and bounds over the last five years, according to budget documents, but admissions tax and sales tax haven’t matched the growth.

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Officials hope city reserves and a ballot measure will fill the deficit

Inglewood has had budget issues before. The deficit approached $18 million in 2010, just before Mayor James Butts was elected, while reserves fell to around $11 million.

This time around, officials say Inglewood has over $150 million in reserves. 

Butts said those reserves have allowed the city to take an aggressive approach to improving streets, traffic lights and other city infrastructure.

“We put the money there because we want the city to be rehabilitated,” Butts said.

Pulling from reserves, though, isn’t something a city can do indefinitely. City Manager Louis Atwell wrote in a budget report that staff expect tax revenue to keep increasing and new developments to give the city an additional boost. With staff keeping an eye on operating costs, Atwell wrote, those revenues would narrow the city’s budget gap down the line. 

This year’s election could also come into play. The two city ballot measures voters will see — AT and BB — are the product of a larger battle between the city and its stadiums over billboard advertisements and the development deal that brought SoFi Stadium to Inglewood.

Either measure could have a substantial effect on the city’s books. 

Inglewood currently pulls in a 10% tax on SoFi Stadium tickets, but with an annual ceiling on how much the city can get. Measure AT, backed by billboard company WOW Media, would remove the cap and add a new 2.5% tax for the Intuit Dome.

Officials estimated it would bring in between $45 million and $50 million extra annually, more than enough to cover the city’s current deficit. Atwell cautioned, though, that the figures aren’t guaranteed and could depend on economic conditions, the timing of the measure’s roll-out and other factors. 

On the flip side, officials said Measure BB could curtail billboard fees and ratchet the deficit up to almost $39 million. 

The initiative would ban most commercial advertising on the large video billboards that have cropped up along the city’s main roads. Measure BB would cut off a revenue stream that, according to past budget documents, has brought the city between $3 million and $7.5 million. 

City officials itemized how much Inglewood made from billboards in each of the last 10 years, but did not do so in this year’s budget. 

The ballot measures are just a few items on a packed Inglewood ballot that includes elections for mayor, two city council members and three Board of Education trustees. 

International politics moved front and center in the Los Angeles mayor’s race Tuesday night, with the candidates offering differing views on how to describe what’s happening in Gaza.

Incumbent Mayor Karen Bass and challenger City Councilmember Nithya Raman answered questions separately at a forum sponsored by the Jewish Federation of Los Angeles at the Skirball Cultural Center in the Sepulveda Pass. The candidates were interviewed back-to-back on stage by moderator Alex Cohen.

The forum was designed to address the concerns of Jewish Angelenos.

Raman was asked about her use of the term “genocide” and whether it is appropriate to describe Israel’s attacks on Gaza.

L.A. City Councilmember Nithya Raman, right, on stage with moderator Alex Cohen at the Skirball Cultural Center during a mayoral forum on Tuesday, September 29, 2026.

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“I used it because other experts have used it to describe what’s happening,” she said. “And I used it because I felt compelled to speak out about issues that we saw, the images that we saw, the targeting of hospitals, the deaths of children.”

Bass had a different response from her opponent when asked whether she believes the term applies in Gaza.

“When I think of foreign affairs, especially conflicts, my focus is on how they impact the city of L.A. — no, I don’t,” Bass responded.

L.A. Mayor Karen Bass answers questions at a mayoral candidates forum held at the Skirball Cultural Center.

The Gaza Health Ministry estimates 74,000 Palestinians have died in the war, including many children and noncombatants.

The war started on October 7, 2023, when Hamas-led militants launched a surprise attack on Israel, killing around 1,200 people and kidnapping 251.

Genocide is an international crime defined by the United Nations as any act committed with the specific intent to destroy, in whole or in part, a national, ethnic, racial or religious group.

The U.S. government and Israel vehemently deny genocide is going on in Gaza. Many other countries and human rights organizations disagree, saying it is genocide.

Candidates differ on Israel boycott

The two also split on the boycott, divestment and sanctions movement against Israel.

Raman called it “a legitimate form of peaceful protest” against Israel over its treatment of the Palestinians, prompting loud boos from some in the crowd.

“I support people’s right to protest,” she said. “And I will fight for that right even when I don’t agree with protesters, or when I agree with protesters.”

Raman is a member of the Democratic Socialists of America, which supports the boycott and divestment of Israel.

Bass said she would oppose any effort to enact sanctions against Israel.

Cohen also asked Raman about her appearance with Hasan Piker, a left-wing Twitch streamer and outspoken critic of Israel.

Raman said she disagreed with some of Piker’s views, saying it’s important for elected officials “to go speak to them even when you disagree.”

Raman said she has been an outspoken critic of antisemitism and was the first L.A. elected official to denounce the 2023 attack on Israel.

National polls on Gaza

The divergence in views between Bass and Raman represents a larger shift in the Democratic Party over Israel.

A new AP-NORC poll found erosion of support for the longtime U.S. ally, with rising opposition from Democrats.

About one-third of U.S. adults — including roughly half of Democrats — believe that Israel has committed genocide against Palestinians during the war in Gaza, according to The Associated Press. About 2 in 10 Americans say Israel has not, and the rest, about half, don’t know enough to say.

A similar share, 30%, of Jewish adults say Israel has committed genocide, although about half, 49%, say it has not.

“40 hours, $2M+ AI credits, solve an open problem.”

So read the splashy announcement for the “Mathathon” at the California Institute of Technology in Pasadena. Dozens of teams would work to solve vexing math problems with the help of artificial intelligence as part of “the first hackathon ever devoted to research level mathematics,” according to the early September post. AI juggernauts Anthropic and OpenAI were set to sponsor the two-day competition.

The backlash came swiftly. Critics objected not only to using AI to tackle open problems, but also to the involvement of AI companies whose models and research practices they have criticized.

Within days, current and former Caltech mathematicians published an open letter calling on the undergraduate organizers to suspend the event. The Mathathon, they argued, would only fuel the creation of “slop mathematics” and serve as public relations for the companies.

Instead of canceling the event, Caltech student organizers responded as any mathematician would — they tried to solve the problem.

The undergraduates redesigned the competition. Instead of trying to solve open mathematical problems, teams will now aim to develop alternative proofs for existing, yet unsatisfying solutions. The November event will also no longer be sponsored by the companies that develop proprietary AI models.

“We came to the decision that we want to put up an event that unites the math community, rather than divides it,” Brian Zhao, one of the Mathathon organizers and a junior studying applied mathematics at Caltech, told EdSource.

The controversy over the Mathathon event laid bare the growing tensions unfolding in the mathematics community over what role AI should play in advancing the field.

AI has already helped to solve elusive math problems. OpenAI announced this month that it used an internal AI model “significantly more capable” than the latest publicly available models to solve one of the remaining six Millennium Prize Problems. But mathematicians have warned about AI’s negative impact on mathematics students, and criticized these companies’ approach to solving high-profile problems.

“To put it bluntly, AI companies are engaging in research misconduct,” wrote the authors of the open letter, which gained the signatures of 2,038 academics as of this week.

‘That’s not the culture of mathematics’

Earlier this summer, Zhao and his roommate came up with their idea of a fun weekend: lock themselves in a basement and try to solve math problems for 40 hours straight. He was inspired by hackathon-style competitions in which programmers and designers compete to build hardware or software under deadline.

The idea of using AI to try to solve open math problems was two-fold. With mathematics undergoing one of the biggest changes in decades because of AI, the Caltech undergrads wanted to organize an event to experiment with AI and better understand how the field may evolve by the time they start graduate school.

Also, the students hoped that advertising the event with flashy statements — like suggesting teams would have access to $2 million in AI credits — would attract high-profile professors as judges and big lab sponsors.

“What is the role of a mathematician when AI can solve conjectures faster?” Mathathon organizers initially asked on the event’s website.

The AI-infused premise of Mathathon drew the ire of current and former Caltech mathematicians.

“I found it pretty outrageous, taking $2 million worth of sponsorships from OpenAI and Anthropic (and) partnering with these companies that have been, in my opinion, and many other mathematicians’ opinion, very disrespectful to our field,” said Yujin Kim, a postdoctoral fellow in Princeton University’s math department.

Kim had been critical of OpenAI’s approach to solving elusive mathematics problems in viral social media videos. The companies’ sponsorship of the event “felt like aligning with the empire,” Kim said.

“I can’t imagine [the Mathathon] would go any way other than just essentially button pressing and prompting,” Kim said. “That’s not the culture of mathematics. That’s not how we operate.”

After the backlash, OpenAI pulled its support from the event.

“We recognize that the rapid progress of AI in mathematics is disruptive,” Dan Roberts, OpenAI’s research lead, said in a social media post after the open letter was published. A spokesperson for Anthropic declined to comment.

The updated Mathathon competition will allow participants to use AI, but highly encourage them to use open-source tools that can be modified by the public instead of proprietary models run by private entities like OpenAI.

“We are proud of all of our students for the passion, drive, and maturity they have shown throughout this development,” Caltech spokesperson Emily Velasco said in a statement. “The spirit of open inquiry is central to the scientific process, and we hope to see a continued exchange of ideas as the math community charts its course forward.”

Zhao said he and his fellow organizers are determined to move forward with hosting the event. He said organizers hope the Mathathon will allow students to discover ways to use the technology responsibly, and build a bridge between AI developers and the math community.

AI can act like a shortcut to solving math problems

AI has conjured much debate in the math community, some of which has been overdue, said Dimitri Shlyakhtenko, a UCLA math professor who has followed Mathathon developments but did not sign the open letter.

From the outside, it may look like AI is upending the field by solving high-profile problems that have stumped mathematicians for decades. But the reality is more nuanced, Shlyakhtenko said.

“It is very rare that some result in mathematics is obtained out of nothing,” he said. “It usually builds on a mountain of other works that happen, and usually there’s a community of people that care about a particular set of problems.”

Mathematics problems aren’t about the destination of finding a solution, he said. Rather, mathematicians develop new techniques and understandings along the journey to solve a problem. He likened it to hiking to a waterfall. The end goal is to see the waterfall, but the things you discover along the journey are also quite interesting and of value.

With AI, he said that “what we’re seeing right now is that it is sometimes possible to take a kind of a direct shortcut.”

Some mathematicians worry that using AI to solve problems robs training opportunities from younger mathematicians.

Training problems provide opportunities for graduate students to learn skills and approaches to mathematics, but “if those just get solved, then the motivation to do it is kind of gone, right?” Shlyakhtenko said.

Over the past several months, as the Mathathon drama unfolded, Zhao said he has learned two important lessons: Be ambitious and be humble.

Maintaining the lofty goal of the event — of trying to help unravel the thorny debate of AI’s role in mathematics — has helped the team persist in the face of challenges, Zhao said. He added that it also developed the event into something more than just a fun, competitive weekend. The conversations with mathematicians around the world about the event have also taught him to be wary of flashy statements.

“If we just present ourselves honestly as undergrads who are curious about AI, we actually attract more sympathy,” Zhao said. “We actually attract more mathematicians who are willing to help us.”