Physicist.

Joined October 2015
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24 Dec 2025
TensoriaCalc: A User-Friendly Tensor Calculus Package for the Wolfram Language. stargazing.net/yizen/Tensori… github.com/tensoria/Tensoria… I hope it will prove useful to both students and researchers. Feedback welcomed. @MathematicaTip @WolframResearch

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Yi-Zen Chu retweeted
Housed within the American Association of University Professors (AAUP), the group's conception of academic freedom seems to have little to do with free speech. Here's a meeting where one fellow says that UPenn punishing Amy Wax for her speech was academic freedom in practice.
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Yi-Zen Chu retweeted
The Department of Justice has issued an opinion to the Equal Employment Opportunity Commission (“EEOC”) that its guidelines about disparate-impact liability under Title VII of the Civil Rights Act are unconstitutional. The Office of Legal Counsel found that EEOC’s guidelines pressured employers to engage in racial discrimination. "Despite trying to promote equality, EEOC's disparate impact liability interpretation under Title VII actually fosters the very discrimination its guidelines seek to address," said Acting Attorney General @DAGToddBlanche. "This opinion will now allow businesses to hire based on performance, restoring equal opportunities in the American workplace." 🔗: justice.gov/opa/pr/justice-d…
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Yi-Zen Chu retweeted
The University of Alberta (@UAlberta) just posted 3 new jobs for tenured professors of medicine For 1 of the jobs, anyone may apply For the other 2 slots, applications are restricted to "persons who self-identify as a woman and/or gender minority" @jkenney @ABDanielleSmith
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What's so "worrisome" that only 2/20 Master's students are female? This DIE at a Spanish theoretical physics institute. Quite clear to me, DIE is spreading, not dying.
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^This is DIE...
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Yi-Zen Chu retweeted
Most Liberals think the BLM Riots resulted in less than $10 million dollars in property damage. Reality: The BLM Riots resulted in over $1 billion dollars in property damage.
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Yi-Zen Chu retweeted
Hong Kong was long the main place where large-scale, open remembrance of the events of Tiananmen Square in 1989 was possible. It drew hundreds of thousands. In mainland China, it is snuffed out to a degree that is shocking. Steadily, this has been eroded by the authorities. In 2020, under the premise of covid19 restrictions, there was a clamp down. Many defied it; arrests followed for unlawful assembly. This coincided with Beijing imposing the National Security Law (NSL) in June 2020, which broadly targeted secession, subversion. In 2021, Tiananmen memorials, museums, and statues (like the "Pillar of Shame") were removed from universities. Arrests and detentions continued throughout the years for the mere crime of bringing flowers, wearing black clothing, or even just social media posts in commemoration of the Tiananmen massacre. Just a few weeks ago, the trial of the former organizers of the yearly Tiananmen vigil concluded. They await the verdict, which is almost certain to be a jail sentence. This year, the authorities have banned family and relatives of the victims from visiting their graves in Beijing. The ruthless efforts of intensifying censorship by the CCP has swallowed the truth in the land where it happened and now, Hong Kong which was the keeper of its memory. But this role is no longer, even if it still exists in the hearts and minds of Hong Kongers. To those of us overseas, this is a duty. We are the keepers of a memory the powerful wish to bury. In our living rooms, across time zones, through late-night conversations and quiet tears, we hold the history to which there are no more monuments, to which there are blank pages in the history books. We remember the students with their hunger strikes and hopeful banners. We remember the ordinary citizens who stood beside them. We remember Tank Man. We remember the mothers who lost children and were told their grief was unpatriotic. We remember because forgetting would betray not just history, but the very humanity we share. We honor the courage of those who stood in the square and the quiet strength of those who still mourn in private. We keep alive the dream that was crushed but never fully extinguished. I hope those of us overseas will post the images, share the news and tell the stories. In this act of fidelity, we become a bridge between what was lost and what may yet be reclaimed. The CCP may control the narrative within its borders, and now increasingly, well beyond them, but we in the West with an open information ecosystem have a duty to not let this memory die. As long as we remember, they have not won. June 4th, 2026 37th Anniversary
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RT @TheRabbitHole: Full George Floyd Bodycam Footage. He repeatedly says "I can't breathe" around the 10-minute mark. From Grok: Official…
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Is naming a female-only physics scholarship in physics after C.S.Wu an ethical thing to do?
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I tell my own graduate students applying for PhD programs: take the GREs--do well in them--and sensible folks within admissions committees will pay some attention.
This is the data we looked at here at UT when deciding whether to ask for the Physics subject GRE or not. Unlike UGrad GPA, the physics GRE was a good predictor on whether a sudent would complete their PhD or not. We ended up abandoning it anyway.
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Yi-Zen Chu retweeted
"There were two statements that the NRAO made. One is that everybody has equal rights, and treated without regard to their race or sex. And the other is, 'No, that’s not true.'" After a distinguished career in radio astronomy James J Condon retired from the National Radio Astronomy Observatory in Charlottesville with the rank of Emeritus Astronomer. Through the latter stages of his career at the NRAO, Jim Condon was a quiet voice speaking out discreetly and consistently against the discriminatory policies of Diversity, Equity, and Inclusion (DEI) that were becoming entrenched at the NRAO. For this, Condon was unceremoniously stripped of his emeritus status, essentially exiling him from the community of astronomers he had been a part of for decades. This action by the NRAO was illegal under Title VII of the Civil Rights Act, so Jim Condon sued the NRAO and their parent organization, the Associated Universities Inc, and won his case. Watch the full episode with Condon & Scott Turner: youtube.com/watch?v=-pXsldgY…

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Particles for Justice is why I've been asking--for a number of years now--"Where are the seniors?" (Astro)physicists rail against Trump etc. to virtue signal to their own; when they have all but lost moral standing because they are unwilling and unable to self-correct.
Replying to @Yi_Zen_Chu
Yes, roughly (after taxes, CERN is exempt).
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Yi-Zen Chu retweeted
en 2018, au Cern, le physicien Alessandro Strumia, professeur de physique des particules à l'université de Pise et, entre autres, coauteur de l'étude sur la découverte du boson de Higgs, présente des données bibliométriques – internationales et courant sur un demi-siècle – relatives à l'autorat et à l'embauche en physique fondamentale. Selon ses calculs, elles permettent d'attester d'un fait somme toute réjouissant : les femmes ne sont pas victimes de discriminations sexistes dans sa discipline et si discrimination il y a, toujours selon les données de Strumia, elle serait plutôt favorable aux femmes, qui obtiennent en moyenne des postes plus tôt dans leur carrière et avec moins de publications et de citations que leurs collègues mâles la suite ? on vous la faite courte : un lynchage numérique d'une violence et d'une malhonnêteté qui n'ont, malheureusement, plus rien d'inouï, aucun débat sur le fond/la véracité des données et un physicien contraint de devoir renoncer à son statut de "chercheur invité" au CERN et aujourd'hui, encore et toujours, on voit ce genre de fausses infos se véhiculer assez simplement parce qu'on diabolise tout ce qui peut - et sérieusement - les contredire 👇
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Assistant professors would usually need to be on a H1B--i.e., teaching and researching--*while* waiting for their Green Card applications to be processed/approved. What now?
Replying to @ReichlinMelnick
People get green cards two ways: 1. Apply for an immigrant visa at a U.S. consulate abroad. 2. Apply for a green card while already in the USA. The new @USCIS memo seems to say that most people in group 2 should generally be denied a green card and forced to apply abroad.
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Yi-Zen Chu retweeted
"Relative to the general population, liberals are overrepresented among faculty by 186% - vastly more than men and considerably more than Asians. Meanwhile, conservatives are underrepresented by 70% - more than Hispanics, Black people, and Native Americans." stevestewartwilliams.com/p/a…
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Even (astro)physicists are dominated by the far Left. Find me one who is willing to speak publicly and unequivocally against DIE; and strongly advocate for the American Creed of judging folks by *individual merit*. Instead you have the Sean Carroll's and Neil deGrasse Tyson's.
Not only have conservatives become vanishingly rare in academia, so have centrists. That’s how complete the left’s dominance is: Even moderates are now a fringe group in academia. stevestewartwilliams.com/p/a…
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Violence, cancellation, professional harassment--all in the name of Holy DIE and Social Justice. Instead of deep self-reflection and assertive pushback against the corruption in their backyards, academics merely thump their chests in self-righteousness.
🚨 Controversial philosopher of science Dr Nathan Cofnas suffered a concussion last month after a protester allegedly threw a glass projectile at him following a talk at Ghent University. This is not the first time Cofnas has faced an organised campaign over his views on race, heredity and intelligence — nor, indeed, threats of violence. In an account published this week, Cofnas describes sustained institutional and social pressure during his time at Cambridge. Senior figures within the university discussed finding “the explicit rationale to getting rid of him”, while students and academics organised petitions demanding his removal. Most alarmingly, students discussed “jump[ing] him”, visiting Emmanuel to “f**k up” this “absolute piece of sh*t c**t”, and “beat[ing] the sh*t out of him”. One need not agree with Cofnas’s arguments, or regard the underlying questions as beyond criticism, to recognise how corrosive this recurring undertow of violence is to #academicfreedom. In an environment where threats, intimidation and even physical harm are ever-present for heterodox thinkers, the ability to test, challenge and debate prevailing orthodoxies will inevitably be chilled, and conventional wisdom risks hardening into what John Stuart Mill called “dead dogma”. Full story here: afcomm.org.uk/2026/05/15/phi…
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For those unfamiliar, Singapore not only regularly sues/persecutes alternate media and political dissidents, it has a Ministry of Truth of sorts. It is as Orwellian as it gets. pofmaoffice.gov.sg/regulatio…

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