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ProfKeithDevlin

@profkeithdevlin

Mathematician (Emeritus, Stanford), author, blogger, and avid cyclist. For many years "The Math Guy" on NPR. Co-founder of the ed tech company BrainQuake. Also https://tinyurl.com/w6p2bx5s

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24.11.2023
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Latest posts by ProfKeithDevlin @profkeithdevlin

The BBC Censored Me ...
The BBC Censored Me ... YouTube video by Rutger Bregman

What a massive fail by the #BBC. This is the prestigious Reith Lectures series they have censored. When senior positions are given to weak people, democracy can crumble fast. www.youtube.com/shorts/ZHhbb...

09.03.2026 17:31 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Two Recent News Stories on Educational Technology Carry Good News and Bad – Mathematical Association of America

Why is most ed tech so poor? Some thoughts from an ed tech developer. New "Devlin's Angle" post for the MAA maa.org/math-values/...

05.03.2026 06:21 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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β€œThe Intern in Charge”: Meet the 22-Year-Old Trump’s Team Picked to Lead Terrorism Prevention One year out of college and with no apparent national security expertise, Thomas Fugate is the Department of Homeland Security official tasked with overseeing the government’s main hub for combating v...

Some questions that no one has asked: Why Kristi Noem put an inexperienced 20-something in charge of terrorist prevention.

www.propublica.org/article/trum...

03.03.2026 16:07 πŸ‘ 2086 πŸ” 827 πŸ’¬ 116 πŸ“Œ 80
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Trans Kansans are Right to Distrust Federal Courts Transgender Kansans are challenging a new discriminatory law in state court, refusing to leave their freedom up to an untrustworthy federal judiciary.

Two Kansans are suing in state court over the new law invalidating trans people's licenses & deputizing bathroom bounty hunters

And they're arguing on state law grounds alone

Kansas's anti-trans law violates federal law too, but federal courts can't be trusted

ballsandstrikes.org/scotus/kansa...

03.03.2026 16:37 πŸ‘ 732 πŸ” 195 πŸ’¬ 7 πŸ“Œ 4
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As Iran War escalates, Trump and allies focus on pushing SAVE America Act While bombs fall on U.S. bases, Trump is posting about the SAVE America Act.

NEW: President Donald Trump and his MAGA allies are not letting a shooting war in the Middle East distract them from their social media campaign for passage of the SAVE America Act. www.democracydocket.com/news-alerts/...

03.03.2026 16:48 πŸ‘ 641 πŸ” 307 πŸ’¬ 33 πŸ“Œ 18
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03.03.2026 13:06 πŸ‘ 36 πŸ” 16 πŸ’¬ 5 πŸ“Œ 3
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I guess this is the State of the Union message that matters to everyone on the planet except the Republican States in what was once a union.

24.02.2026 20:08 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I see my birth nation, the UK, still believes that no one is above the law, even royalty. I wish the country that invited me to move here in 1987, and where I have been a citizen since 2000, believed the same. The US used to be such a nation. It pains me that such is no longer the case.

19.02.2026 13:54 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'd simply ask for Congressional Republicans to give a crap as what's happening to blue states right now could easily happen to red states during a subsequent administration. This is a, frankly, dangerous precedent.

06.02.2026 17:45 πŸ‘ 32 πŸ” 2 πŸ’¬ 7 πŸ“Œ 0
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Normal people would be prosecuted and jailed for a hate crime.

Trump gets off with an 'Ooops' ????

06.02.2026 17:53 πŸ‘ 24 πŸ” 5 πŸ’¬ 6 πŸ“Œ 0
In memory of the 37-year-old Minneapolis residents Alex Pretti and Renee Nicole Good, ordinary American citizens who agents of our federal government publicly executed recently. (There are least six others who ICE agent have murdered this year so far.)

Since September 1991, the MAA has afforded me the enormous privilege to express my personal opinion in its monthly members communication; the print magazine FOCUS from September 1991 to December 1997, and the online e-zine (currently the MATH VALUES section of the MAA website, originally MAA Online) from January 1996 until today. (My goal/hope is to continue to March 2027, when I turn 80; you’ll soon be free of me, dear MAA colleagues.)

In memory of the 37-year-old Minneapolis residents Alex Pretti and Renee Nicole Good, ordinary American citizens who agents of our federal government publicly executed recently. (There are least six others who ICE agent have murdered this year so far.) Since September 1991, the MAA has afforded me the enormous privilege to express my personal opinion in its monthly members communication; the print magazine FOCUS from September 1991 to December 1997, and the online e-zine (currently the MATH VALUES section of the MAA website, originally MAA Online) from January 1996 until today. (My goal/hope is to continue to March 2027, when I turn 80; you’ll soon be free of me, dear MAA colleagues.)

Hull-born Stanford mathematician @profkeithdevlin.bsky.social has been writing a monthly column about mathematics for the Mathematical Association of America since 1991. This month's piece is in memory of Alex Pretti and Renee Nicole Good:
maa.org/math-values/...

03.02.2026 19:40 πŸ‘ 7 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
This month’s post is that there is no post this month – Mathematical Association of America

In a rare pause, Keith Devlin reflects on why he could not write as usual and what this moment means for our shared values as a mathematical community.

Read the Math Values post: https://bit.ly/49YfHSA

03.02.2026 17:52 πŸ‘ 9 πŸ” 5 πŸ’¬ 0 πŸ“Œ 4

An important choice by @profkeithdevlin.bsky.social .social , one of the leading math communicators of our time. #iTeachMath

03.02.2026 19:12 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
This month’s post is that there is no post this month – Mathematical Association of America

My new "Devlin's Angle" post for the MAA.
maa.org/math-values/...

03.02.2026 19:24 πŸ‘ 4 πŸ” 1 πŸ’¬ 1 πŸ“Œ 1
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It's spring in Sonoma County. Time to bike over to one of my favorite local wineries, a 27 mile round trip involving two massive climbs over Sonoma Mountain. (Well, they seem massive at my age. πŸ₯΄)

02.02.2026 01:17 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
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My boss now and forever
Thank you!

28.01.2026 18:40 πŸ‘ 2812 πŸ” 536 πŸ’¬ 22 πŸ“Œ 19
Bruce Springsteen - Streets Of Minneapolis (Official Audio)
Bruce Springsteen - Streets Of Minneapolis (Official Audio) YouTube video by Bruce Springsteen

I wrote this song on Saturday, recorded it yesterday and released it to you today in response to the state terror being visited on the city of Minneapolis. It’s dedicated to the people of Minneapolis, our innocent immigrant neighbors and in memory of Alex Pretti and Renee Good.

Stay free

28.01.2026 17:02 πŸ‘ 97504 πŸ” 40889 πŸ’¬ 4302 πŸ“Œ 5362

In the 1990s I (a mathematician) collaborated with a London-based sociologist on a project to improve the efficiency of large teams working on EU construction projects, on the basis of which, after 9/11, I was asked to join an NSA-funded project to improve Defense Intelligence Analysis. Ho hum πŸ€”

28.01.2026 02:39 πŸ‘ 17 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

β€œIf you raise your voice I’ll erase your voice” said an ice agent.

Insane

28.01.2026 01:33 πŸ‘ 13510 πŸ” 3851 πŸ’¬ 856 πŸ“Œ 201
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We are truly in the age of the troglodyte

28.01.2026 02:15 πŸ‘ 547 πŸ” 46 πŸ’¬ 12 πŸ“Œ 4

Looking forward to hosting the World Cup in a couple months!

28.01.2026 01:02 πŸ‘ 4559 πŸ” 802 πŸ’¬ 83 πŸ“Œ 24

Life under a Republican administration

28.01.2026 02:20 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Life under a Republican administration

28.01.2026 02:20 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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β€˜A militia that kills’: uproar in Italy over ICE security role at Winter Olympics Milan mayor says agents β€˜not welcome’ in co-host city and Italy can take care of security itself

Italy is right. They should not accept ICE agents to provide "security" at the Winter Olympics next month. The agency is a bunch of poorly trained, trigger-happy sociopathic thugs. www. www.theguardian.com/us-news/2026...

28.01.2026 02:05 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Sunset-lit reception at Lawrence Hall of Science in Berkeley last Thursday

26.01.2026 16:11 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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β€˜What Sort of Nation Terrorizes Children?’: A Teacher’s View From Minneapolis (Opinion) My students live with the knowledge that anyone they love could be taken by ICE at any moment.

This is America under a Republican administration. Republicans in Congress, and their voters, don't give a shit (many actively support it). But the majority of Americans are appalled by their lack of morality and the wanton cruelty. www.edweek.org/leadership/o...

26.01.2026 12:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Emergency Video: The Second Amendment Doesn't Care About Your Pro-Fascist Agenda I have seen, as all of you have, fake arguments put out by so called β€œsecond amendment” proponents.

adamkinzinger.substack.com/p/emergency-...

26.01.2026 05:25 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

They’re really going for the hardest of the criminals

24.01.2026 03:02 πŸ‘ 681 πŸ” 170 πŸ’¬ 18 πŸ“Œ 5

Stand with the people πŸ’ͺπŸ’ͺ

24.01.2026 02:25 πŸ‘ 995 πŸ” 255 πŸ’¬ 11 πŸ“Œ 24
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German soccer federation official wants World Cup boycott considered because of Trump A German soccer federation executive committee member says it’s time to consider a World Cup boycott because of the actions of U.S. President Donald Trump.

A German soccer federation executive committee member says it's time to consider a World Cup boycott because of the actions of U.S. President Donald Trump.

23.01.2026 22:00 πŸ‘ 18942 πŸ” 4948 πŸ’¬ 1161 πŸ“Œ 1528