yy26

全网最尴尬的可能就是北大。 不是王虹拒绝回国任教，也不是王虹离开北大才获奖，而是王虹在采访中亲口说：在北大，长期觉得自己“能生存下来就不错了”。 ​这句“能生存下来就不错了”，王虹说了不止一次。 在法国《世界报》专访里她补充道：“在我的班级里，有一些人真的非常优秀。我并不确定自己的能力……我没有觉得自己拥有和他们一样的天赋。” ​说这话的人，16岁以653分考入北大，大二从地球与空间科学学院转入数学科学学院。可进了数院，她发现自己周围全是奥数金牌得主和竞赛大神。没受过系统竞赛训练的王虹，一度是班上的“小透明”。 ​她的同学、后来成为北大博雅特聘教授的孙鑫回忆得特别直接：“坦率地说，那时我还没有意识到王虹会从事严肃的数学研究。” 连同学都不看好她。 北大教授田刚也承认：“她不是竞赛生，在班上的表现也不是最亮眼的。” ​一所中国最顶尖的大学，一个后来拿下菲尔兹奖的人，当年在这所大学里只觉得“能生存下来就不错了”。这话搁谁听了不扎心？ ​王虹后来去了法国。 一个在北大连生存都觉得吃力的人，换个环境反而找到了自己的路。 2025年2月，她与合作者发表127页论文，彻底证明了困扰数学界逾百年的三维挂谷猜想。 2026年7月23日，她成为菲尔兹奖90余年历史上第三位女性获奖者、首位中国籍女性得主。 ​问题来了：王虹在北大“能生存下来就不错了”，是她的问题，还是北大的问题？ ​有人说这是谦虚，天才都这样。可王虹的原话是“一直在挣扎”。挣扎和谦虚是两码事。一个真正享受数学的人，在北大感受到的不是滋养而是挣扎，这所大学的人才培养机制是不是该反思一下？ ​王虹获奖后，北大发文祝贺。可如果她当年没熬过来呢？如果她在法国那一个月真的转了行呢？ 有人说“是金子总会发光”，可问题是，有些土壤会埋没金子，让金子发不出光。 作者：静静的顿河

How Ordinary Jews Fought Persecution in Hitler’s Germany youtube.com/watch?v=r7xA3g…

Congratulations to the students who competed at the International Mathematical Olympiad (IMO) 2026. 👏 We put Nemotron 3 Ultra to the test to take on the same problems in the same time limit, with no internet or external tools. The IMO team graded its solutions 30/42, above the 29-point gold threshold. 🥇

Why Are Palantir and OpenAI Scared of Alex Bores? nytimes.com/2026/04/21/opi…

Assuming this is correct, it is for me the first example of an LLM solving a problem not in my area that was nevertheless big enough that I had very definitely heard of it. Again it's a counterexample, so not in "end of mathematics" territory, but still pretty amazing.

The airline lost my bag for 72 hours. They handed me a $50 “courtesy” voucher at the baggage desk and smiled like they’d done me a favor. I kept the voucher. Then I opened my laptop and used a 1999 international treaty they never mention at check-in. Total recovered: $1,650. Here are the three legal weapons most passengers never know they have.👇

This is quite a remarkable result: Posed in 1939, the Jacobian conjecture is one of the central open problems in algebraic geometry, but was just disproved by Alpoge, Matthew, and Claude Fable 5. The Jacobian conjecture roughly says that a multivariable polynomial F has an inverse function (made out of polynomials) provided the Jacobian is non-singular (i.e. matrix of partial derivatives has non-zero determinant). This condition is neccessary by the Inverse Function Theorem from multivariable calculus. The hard question is whether it is also sufficient. Evidently, Fable found that F(x,y,z) = ((1+xy)^3 z + y^2 (1+xy) (4+3xy), y + 3 x (1+xy)^2 z + 3 x y^2 (4+3xy), 2 x - 3 x^2 y - x^3 z) has det(J_F) = -2 non-zero. However F is not invertible, since F sends three different pts (0, 0, -1/4), (1, -3/2, 13/2), and (-1, 3/2, 13/2) to the same image (-1/4, 0, 0). Beyond the disproof itself, it would be value to know if a suitably refined conjecture is recoverable. Per @Acer, GPT5.6 has proposed: "A constant-Jacobian polynomial local biholomorphism with no loss of sheets at infinity—e.g. a proper Keller map—is an automorphism." I would be interested to know if any algebraists (e.g. @levent @littmath) have a reaction to this... A further twist to the story: Not only was the Jacobian conjecture one of the central open problems in algebraic geometry, it was (a special case of) Yitang Zhang's PhD problem! The catch was that Zhang's advisor had him solve it, assuming a lemma of his advisor. But that lemma turned out to be false! As a result, Zhang's thesis crumbled and he then struggled to get recommendation letters and a permanent academic position. Despite all this, Zhang went on to prove bounded gaps between primes! This is one of the most inspiring stories in modern mathematics, and was a motivation for me to work in the same area for my doctorate.

The US today has removed sanctions against six Hong Kong officials: Justice Secretary Paul Lam National Security Dept chief Sonny Au Former Police Commissioner Raymond Siu Former Police Commissioner Stephen Lo Assistant National Security Dept chief Dick Wong Former Assistant National Security Dept chief Margaret Chiu All key current and former players in the crackdown on human rights, imprisonment of opposition political leaders and activists, and abrogation of the city's autonomy. Just shocking and shameful action by the Trump Administration.

"Mediocrity knows nothing higher than itself; but talent instantly recognises genius"

I resigned from Google DeepMind bc it broke its founding promise by selling AI to the military without restrictions against killer robots or mass spying. For months, I worked to stop this but watched powerful ethicists and institutions choose silence. Here's what happened. 🧵

The fight over Hormuz boils down to one poorly worded clause in Trump’s deal msn.com/en-us/news/wor…

A drone photographer captured the moment a great white shark stalked a pair of paddleboarders off the coast of California.

At just 22, Connor Gibson is doing something he never dreamed possible: using his engineering skills to 3D print dentures for America's most vulnerable people — and giving them back their sense of dignity in the process. cnn.it/4oG1UWF

Breaking News: Alan Greenspan, a skilled political operator who served as chairman of the Federal Reserve through prosperity and crisis, has died at 100. nyti.ms/4b4EtAu

Barack: You told me all those years ago that you couldn’t promise me the world, but you could promise me an interesting life. Of course, you outdid yourself and managed to give me both. Eight years in the crucible, and not once did you melt from the heat. Not once did you let it harden you. Instead, you used it to reveal your truest essence: your stubborn optimism and unflinching courage, your dazzling brilliance and unpretentious decency, your ferocious work ethic and absolutely unshakable moral fiber.

Over the past 19 years, I've watched @MichelleObama, who never sought a career in the public eye, become a master orator. Her speech yesterday at the opening of the Obama Presidential Center may have been her very best. Moving, direct and powerful.

More than 40 years ago, I arrived in Chicago in search of an idea. I was a young man looking for purpose, who believed deeply in America, was inspired by the Civil Rights Movement, and wanted to be a part of something larger. The America I believed in was one where everyone has opportunity, everyone is seen, everyone belongs—because that was an America that had a place for me, too.

Ukraine launches TrophyLab: we are opening access to captured Russian weapon technologies for our global partners. Every missile, drone, and vehicle seized on the battlefield is now a source of knowledge for the free world. Through this secure platform, allied governments, labs, and defense tech manufacturers gain access to deep technical data, reports, and vulnerabilities. Users can also request physical equipment for testing, significantly shortening the development cycle for countermeasures. What was meant to be the enemy's secret advantage is being dismantled to defend democracy. Join the platform: 🔗 trophylab.mod.gov.ua/en/

Is the failure of civic education the primary cause of ideological partisanship in society? youtube.com/watch?v=lpbQXw…

On this day 14 years ago, 1989 Tiananmen activist was murdered by Chinese State operatives after he gave an interview to Hong Kong media from his hospital room expressing his defiance against Chinese Communist Party tyranny. His murderers masqueraded his death as suicide by hanging. But Li could not see, could not walk and struggle to hear after years of torture in Chinese prisons. How on earth did he manage to get himself hanged? China could not even be bothered trying to put together a credible lie. RIP Li Wangyang.