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Silas Johnson

@profsilas

I do math and play Pokemon, and apparently make art sometimes. He/him.

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08.04.2024
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Latest posts by Silas Johnson @profsilas

Happy Calvin's Dad day to those who celebrate

09.03.2026 23:23 πŸ‘ 249 πŸ” 70 πŸ’¬ 4 πŸ“Œ 1

when people go to the gym they shouldn't use weights and machines. They should practice lifting real-world objects that they might need to lift or carry in the future

07.03.2026 19:03 πŸ‘ 19 πŸ” 2 πŸ’¬ 2 πŸ“Œ 0
Preview
Four Colors and Teaching Mathematics What the Four Color Theorem and its history tells us about the role of humans and proof in mathematics education.

I wrote about the story of the Four Color Theorem that I remember being told and Terence Tao and generative AI and some of my thoughts on teaching.

www.peter-keep.com/2026-03-02-f...

03.03.2026 03:06 πŸ‘ 24 πŸ” 15 πŸ’¬ 2 πŸ“Œ 0

Likewise. I'm not sure who gets more annoyed, my students solving trig sub problems, or me writing them. (Kidding, the students easily have me beat out.)

28.02.2026 04:36 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Okay yeah, I was wondering if I missed something there.

27.02.2026 14:18 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Fuck you, I love trans people.

26.02.2026 04:20 πŸ‘ 20 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0

The Mighty Milkshake Ducks

25.02.2026 02:29 πŸ‘ 2061 πŸ” 409 πŸ’¬ 16 πŸ“Œ 17

FOMO but for a party involving a stump

22.02.2026 03:27 πŸ‘ 58 πŸ” 7 πŸ’¬ 3 πŸ“Œ 0

I think Ramadan and Ash Wednesday have about a 1 in 84 chance of lining up, if I understand correctly. Ash Wednesday has a 1/7 chance of being the day of a new moon, and then 1/12 (or 1/13?) chance it's the new moon that Ramadan starts on.

17.02.2026 05:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Awesome, congratulations!

16.02.2026 03:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The way matrices get taught is so ridiculous. IIRC it's functionally indistinguishable from "here's some spreadsheet code we wrote in Excel, now memorize it".

12.02.2026 12:44 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I agree with those numbers, assuming you never have 2 energy in hand and a choice of which to attach.

You have 15 possible combinations of cards that could be your first two energies (order doesn't matter); with 2-2-2, 12 of those work. With 3-2-1, only 11 do.

10.02.2026 14:34 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

My Spanish is not nearly good enough to understand the lyrics in real time, but *this* didn't require language.

09.02.2026 01:43 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm sorry the guy changing the rules on the fly is named what

07.02.2026 14:34 πŸ‘ 17865 πŸ” 4467 πŸ’¬ 250 πŸ“Œ 110
The Olympic rings in a screengrab from the 2026 opening ceremony. Except it's part of an AI generated video segment, and so the blue ring in the upper left is gray instead, and also out of position slightly.  It's hard to tell, but it also looks like the rings don't interlock the way they're supposed to.

The Olympic rings in a screengrab from the 2026 opening ceremony. Except it's part of an AI generated video segment, and so the blue ring in the upper left is gray instead, and also out of position slightly. It's hard to tell, but it also looks like the rings don't interlock the way they're supposed to.

I can only conclude that the IOC fully approves of this rendition of its most important trademark.

06.02.2026 23:53 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Why the hell is there AI slop in the opening ceremony of the Olympics?! You're the IO-fucking-C, you can afford to hire a real animator. It didn't even look good!

A disgusting insult to the artistic tradition of the host country, too.

#Olympics

06.02.2026 21:45 πŸ‘ 7 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

That's what I did, too. And the rubric text included the translations (pass, conditional pass, retry).

I was entering grades on canvas using the same codes, so it made sense. Some students absolutely interpreted them as points, although few if any tried to add up the points, so that's progress.

06.02.2026 02:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Everyone come check out this speedrun fundraiser for MN Women's Immigrant Rapid Response Fund!

Messy lunch fanart - go donate to get Blaze ahead on the donation incentive!
#blazethecat #icebreaker #art

30.01.2026 18:39 πŸ‘ 12 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
Digital drawing of Tangle the Lemur wearing a yellow "fuck ice" t shirt. She's holding a Minnesota flag in one hand and blowing a whistle with the other.

Digital drawing of Tangle the Lemur wearing a yellow "fuck ice" t shirt. She's holding a Minnesota flag in one hand and blowing a whistle with the other.

Tangle is probably my favorite Sonic character, in part because her origin story is just "normal person who jumped in to help however she could when her village was attacked". Seemed relevant.

#tanglethelemur #sonic #minnesota #art

26.01.2026 05:49 πŸ‘ 11 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

THE ICE BREAKER SCHEDULE IS OUT
oengus.io/marathon/ice...

Join us on Friday, Jan. 30th starting at 11:00am ET for a weekend full of the best speedruns we could find in support of Minnesota against ICE!

26.01.2026 04:53 πŸ‘ 566 πŸ” 393 πŸ’¬ 7 πŸ“Œ 55

β€œfuck ICE”
β€œand also with you”

23.01.2026 23:41 πŸ‘ 1369 πŸ” 255 πŸ’¬ 23 πŸ“Œ 20
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They are never, ever going to win in Minnesota.

23.01.2026 20:56 πŸ‘ 26635 πŸ” 5842 πŸ’¬ 437 πŸ“Œ 406

Me and me cousin, one Arthur McBride,
One morning went walking along Lake Street's side
Now mark well what followed in that wintertide
As the cold Friday morning was dawning

23.01.2026 05:06 πŸ‘ 304 πŸ” 87 πŸ’¬ 10 πŸ“Œ 44

I can't figure out how it beats Dengo, and that seems like a serious problem.

21.01.2026 04:09 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Sure, 0-5 day 2 πŸ™‚

Good luck in top 8, @katyptcg.bsky.social!

18.01.2026 20:53 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Acrylic painting of charizard breathing flames, on which is painted in black text "ICE MUST BE DESTROYED"

Acrylic painting of charizard breathing flames, on which is painted in black text "ICE MUST BE DESTROYED"

Digital painting of Latios holding a big energy blast with "ICE MUST BE DESTROYED!!" written on top

Digital painting of Latios holding a big energy blast with "ICE MUST BE DESTROYED!!" written on top

I made these this summer and was kind of shy about it, but here: Pokemon anti-ICE signs. Feel free to use them for whatever you want.

Slogan courtesy of @miawong.bsky.social

#art #pokemon

09.01.2026 23:05 πŸ‘ 198 πŸ” 83 πŸ’¬ 3 πŸ“Œ 4

Good luck!!

18.01.2026 14:08 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Adding some joy to the timelime. From last night's NU @ UNH game

17.01.2026 19:36 πŸ‘ 91 πŸ” 16 πŸ’¬ 1 πŸ“Œ 3

Some people might upload their *own* pictures to the AI, so make sure the photographer photographs all those people, and only those people, who do not photograph themselves.

17.01.2026 15:26 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0