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ProfKeithDevlin

@profkeithdevlin.bsky.social

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

745 Followers  |  476 Following  |  663 Posts  |  Joined: 24.11.2023  |  2.2071

Latest posts by profkeithdevlin.bsky.social on Bluesky

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

03.02.2026 19:12 โ€” ๐Ÿ‘ 2    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
This monthโ€™s post is that there is no post this month โ€“ Mathematical Association of America

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

03.02.2026 19:24 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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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. ๐Ÿฅด)

02.02.2026 01:17 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 1
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My boss now and forever
Thank you!

28.01.2026 18:40 โ€” ๐Ÿ‘ 2752    ๐Ÿ” 510    ๐Ÿ’ฌ 21    ๐Ÿ“Œ 19
Bruce Springsteen - Streets Of Minneapolis (Official Audio)
YouTube video by Bruce Springsteen Bruce Springsteen - Streets Of Minneapolis (Official Audio)

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. Itโ€™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 โ€” ๐Ÿ‘ 97016    ๐Ÿ” 40911    ๐Ÿ’ฌ 4297    ๐Ÿ“Œ 5378

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 ๐Ÿค”

28.01.2026 02:39 โ€” ๐Ÿ‘ 17    ๐Ÿ” 3    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

โ€œIf you raise your voice Iโ€™ll erase your voiceโ€ said an ice agent.

Insane

28.01.2026 01:33 โ€” ๐Ÿ‘ 13531    ๐Ÿ” 3862    ๐Ÿ’ฌ 866    ๐Ÿ“Œ 203
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We are truly in the age of the troglodyte

28.01.2026 02:15 โ€” ๐Ÿ‘ 550    ๐Ÿ” 47    ๐Ÿ’ฌ 12    ๐Ÿ“Œ 4

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

28.01.2026 01:02 โ€” ๐Ÿ‘ 4577    ๐Ÿ” 806    ๐Ÿ’ฌ 83    ๐Ÿ“Œ 24

Life under a Republican administration

28.01.2026 02:20 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Life under a Republican administration

28.01.2026 02:20 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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โ€˜A militia that killsโ€™: uproar in Italy over ICE security role at Winter Olympics Milan mayor says agents โ€˜not welcomeโ€™ 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 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Sunset-lit reception at Lawrence Hall of Science in Berkeley last Thursday

26.01.2026 16:11 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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โ€˜What Sort of Nation Terrorizes Children?โ€™: A Teacherโ€™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 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“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 โ€œsecond amendmentโ€ proponents.

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

26.01.2026 05:25 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Theyโ€™re really going for the hardest of the criminals

24.01.2026 03:02 โ€” ๐Ÿ‘ 687    ๐Ÿ” 170    ๐Ÿ’ฌ 19    ๐Ÿ“Œ 5

Stand with the people ๐Ÿ’ช๐Ÿ’ช

24.01.2026 02:25 โ€” ๐Ÿ‘ 996    ๐Ÿ” 256    ๐Ÿ’ฌ 11    ๐Ÿ“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 itโ€™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 โ€” ๐Ÿ‘ 18943    ๐Ÿ” 4958    ๐Ÿ’ฌ 1170    ๐Ÿ“Œ 1544

ICE

OUT

NOW

MINNEAPOLIS

WILL

WIN

24.01.2026 02:35 โ€” ๐Ÿ‘ 1424    ๐Ÿ” 245    ๐Ÿ’ฌ 22    ๐Ÿ“Œ 5
Simon Marks reacts to Trump's insult to Britain's war dead
YouTube video by LBC Simon Marks reacts to Trump's insult to Britain's war dead

The Republican's position on Europe seems to be raising some ire. www.youtube.com/watch?v=rsmN...

24.01.2026 02:58 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

they didnโ€™t leak it to make the shooter look innocent, but to make the victim look guilty. not guilty of a crime. guilty of having a visibly queer wife. guilty of liberalism. guilty of opposing the regime. they donโ€™t seek to exonerate themselves, only to demonstrate who deserves to die.

09.01.2026 19:00 โ€” ๐Ÿ‘ 23424    ๐Ÿ” 7130    ๐Ÿ’ฌ 338    ๐Ÿ“Œ 332

I would never accuse the Iraqi Army of being well trained or using a lot of restraint. And yet in Mosul I came to expect more discretion from the average Iraqi soldier than U.S. cops who have never taken incoming fire.

10.01.2026 09:13 โ€” ๐Ÿ‘ 1694    ๐Ÿ” 209    ๐Ÿ’ฌ 18    ๐Ÿ“Œ 1
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MINNESOTA: โ€œIโ€™m Native American! This goes against everything I stand for.โ€œ

A couple with a baby in the house face an impossible choice when a terrified female door dash driver runs inside to escape ICE. (They ultimately run them off ๐Ÿ’ช๐Ÿฝ)

Trumpโ€™s America. Full: www.instagram.com/reel/DTUXFIy...

10.01.2026 05:30 โ€” ๐Ÿ‘ 1807    ๐Ÿ” 824    ๐Ÿ’ฌ 78    ๐Ÿ“Œ 92
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Dave Mathews took time on his birthday today to speak out on ICE and the murder of Renee Nicole Good ๐Ÿ”ฅโ€ฆ.HBD Dave!

"Renee Nicole Good, murdered in the streets. He shot her three times in the head. Murdered in cold blood. These people are trying to tell us not to believe what we see. F*ck ICE"

10.01.2026 05:12 โ€” ๐Ÿ‘ 4087    ๐Ÿ” 1263    ๐Ÿ’ฌ 114    ๐Ÿ“Œ 106

A reminder that Elon Musk did not in fact design Teslas or space rockets. He is a glorified PR man.

09.01.2026 17:16 โ€” ๐Ÿ‘ 201    ๐Ÿ” 35    ๐Ÿ’ฌ 6    ๐Ÿ“Œ 0

I know this like the 347th thing but, *You don't put your dog in the car if you're going "use it as a weapon."*

10.01.2026 02:59 โ€” ๐Ÿ‘ 209    ๐Ÿ” 21    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 1
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Catholic Vice President Vance takes to social media to justify killing of Renee Good After the tragic shooting of Renee Good at the hands of ICE, the Catholic vice president of the United States took to social media to justify the killing.

The National Catholic Reporter publicly labeled JD Vance a โ€œmoral stainโ€ on the Roman Catholic faith. The blistering piece went on to point out Vance's โ€œtwisted and wrongheaded view of Christianityโ€ for inflaming tensions by maligning a woman killed by ICE rather than promoting healing.

09.01.2026 19:04 โ€” ๐Ÿ‘ 1456    ๐Ÿ” 430    ๐Ÿ’ฌ 143    ๐Ÿ“Œ 48
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Yes, JD. Letโ€™s ask them if they think a stay at home mom, avowed Christian, and widow of a veteran deserved to be shot in the face and left to bleed out in her own car after dropping her 6-year-old off at school, for the crime of looking out for her neighbors. Letโ€™s ask everyone running for office.

08.01.2026 20:27 โ€” ๐Ÿ‘ 27191    ๐Ÿ” 8409    ๐Ÿ’ฌ 1480    ๐Ÿ“Œ 464

Renee Nicole Good exercised her Constitutional right to protest the tyranny of this regime.

Renee Nicole Good was murdered for being an American.

10.01.2026 04:18 โ€” ๐Ÿ‘ 2507    ๐Ÿ” 580    ๐Ÿ’ฌ 69    ๐Ÿ“Œ 11
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Steve Kerr on the murder of Renee Good:

"It's shameful that the government can come out and lie about what happened when there's video and witnesses who have all come out and disputed what the government is saying."

10.01.2026 04:18 โ€” ๐Ÿ‘ 9340    ๐Ÿ” 2054    ๐Ÿ’ฌ 177    ๐Ÿ“Œ 114

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