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Jim Fowler @kisonecat.com · 29/09/2026

If I were plotting a movie, I'd definitely include a scene about finite-time blowup for Navier-Stokes, just to foreshadow the Singularity coming at the end.

050

Jim Fowler @kisonecat.com · 29/09/2026

Jordan canonical form is canonical but doesn't have a canonical name

The beginning of the Wikipedia article for Jordan normal form: "In linear algebra, a Jordan normal form, also known as a Jordan canonical form, is an upper triangular matrix of a particular form called a Jordan matrix representing a linear operator on a finite-dimensional vector space with respect to some basis."

"Jordan normal form" and "Jordan canonical form" is highlighted.

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Jim Fowler @kisonecat.com · 16/09/2026

Finding inaccessible cardinal eggs is really rare... since inaccessible cardinals can't be built from smaller birds.

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Jim Fowler @kisonecat.com · 02/09/2026

Always eager to discover more... about the paper towel dispenser in the Math Tower restroom?

A paper towel dispenser from Papernet with a "discover more" QR code in the lower right hand corner.

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Jim Fowler @kisonecat.com · 21/08/2026

I am definitely not wearing this ring I got.

Google Search: “giant eye gave me ring of power should i wear it”

AI Overview

Do not wear the ring. A giant eye means you have encountered Sauron or a similar dark lord in Middle-earth. That ring is the One Ring, and wearing it will corrupt your mind, strip away your free will, and reveal your exact location to the enemy instantly.

Why You Should Not Wear It

Total Control: The maker of the ring wants to rule your mind.

Instant Danger: The giant eye will see you the second you slip it on.

Slow Ruin: It twists your thoughts and ruins your life over time.

What You Should Do Instead

Do not put it on your finger.

Keep it hidden in a dark, safe place.

Find a trusted wizard or a brave friend to help destroy it in a volcano.

Should I help you plan a trip to a volcano, or do you need advice on how to hide from the giant eye?

AI can make mistakes, so double-check responses.

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Jim Fowler @kisonecat.com · 09/08/2026

"Keycaps for Sale" is the classic children's book about a keyboard peddler who balances stacks of colorful keycaps... and monkeys who randomly type Shakespeare.

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Jim Fowler @kisonecat.com · 27/06/2026

the most exciting row reduction experience sl2z.xyz

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Jim Fowler @kisonecat.com · 04/05/2026

The Koszul formula doesn't help me to solve the Connections puzzle at all.

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Jim Fowler @kisonecat.com · 27/03/2026

It is grad student visit day! And I'm looking forward to the upcoming curl student and div student visit days.

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Reposted by Jim Fowler

Randall Munroe @xkcd.com · 16/12/2025

Apples xkcd.com/3180/

Comic. [Two people one one side of a pile of seven apples, next to person with long hair next to five apples.] PERSON: Okay, with my seven apples added to your five, we have… let’s se… twelve apples! PERSON 2 [with hands raised]: Incredible! Perfect agreement with the theory! [caption] Experimental Mathematicians

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Jim Fowler @kisonecat.com · 25/11/2025

Need a taskmaster wax seal in order to produce proper final exams for my course.

020

Jim Fowler @kisonecat.com · 24/10/2025

Scatman John singing "skibidi" in...1994! open.spotify.com/track/623rRT...

open.spotify.com

Scatman (ski-ba-bop-ba-dop-bop)

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Jim Fowler @kisonecat.com · 29/09/2025

World's worst calendar: label the 168 hours of the week by elements of PSL(2,7).

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Reposted by Jim Fowler

(co)Brantley (co)Vose @brantleyvose.bsky.social · 18/09/2025

I propose that the *true* center is the mean of every center currently listed in the Encyclopedia of Triangle Centers.

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Jim Fowler @kisonecat.com · 18/09/2025

kisonecat.github.io/triangle-cen... lets you view a ton of triangle centers from faculty.evansville.edu/ck6/encyclop... all at once

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Jim Fowler @kisonecat.com · 09/09/2025

Canvas expects me to organize my linear algebra course into modules -- surely vector spaces would be easier.

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Jim Fowler @kisonecat.com · 28/08/2025

Illad : Aeneid :: Despicable Me : Minions

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Jim Fowler @kisonecat.com · 28/08/2025

A fork() diverged in a unix process; the GPU was sorry it could not travel both.

020

Jim Fowler @kisonecat.com · 16/08/2025

Vacuously-true Pliny on unicorns: "They say that it is impossible to capture this animal alive."

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Jim Fowler @kisonecat.com · 05/08/2025

"times square" involves less arithmetic than I might hope

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Jim Fowler @kisonecat.com · 01/08/2025

I use a directory 𝘹+1 for the academic year including Autumn 𝘹 and Spring 𝘹+1. (I feel super guilty for labeling the time interval using the right hand endpoint.)

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Reposted by Jim Fowler

Jim Fowler @kisonecat.com · 01/08/2025

I sing of R^n and the manifold

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Jim Fowler @kisonecat.com · 30/07/2025

My local movie theater is a member of NATO

A sticker on a window that reads:

MEMBER
NATO
National Association of Theatre Owners

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Jim Fowler @kisonecat.com · 30/07/2025

No water in the math department No chalk on the chalkboard (apologies to @tuneyards.bsky.social)

A crumply paper sign that reads:

ATTENTION
Outage
A Domestic Cold Eater outage will be required

040

Jim Fowler @kisonecat.com · 24/06/2025

"infinite possibilities" is a wonderfully optimistic tagline for apples

A colorful bag of Cosmic Crisp apples, with the tagline at the top that says "amazing flavor + infinite possibilities". The bag features a big painterly image of an apple with three icons that mention snacking, baking, and entertainment.

020

Reposted by Jim Fowler

Benjamin Cornish @mathematicians-pod.bsky.social · 12/06/2025

Very excited to share Episode 2 of Un-Natural Numbers. The #mathschatshow all about a single number, this week the #number2. With fabulous guests @kisonecat.com and Cindy Jiao youtu.be/N53Vvz6cCAE I'm now looking for guests for episode 3, give me a shout if you're interested. #mathsky #mathschat

youtu.be

Un-Natural Numbers: Episode 2

YouTube video by Un-Natural Numbers

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Jim Fowler @kisonecat.com · 12/06/2025

May the Cauchy-Schwarz be with you

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Jim Fowler @kisonecat.com · 06/06/2025

So the weight of the cars causes slight indentations where the wheels sit?

The surface of an empty parking lot showing a few parking spots (outlined in yellow lines), part of a lamp post, and pools of water. The pools of water appear where the wheels of the car would be.

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Reposted by Jim Fowler

ꭓle Ormsby 𓆙 @e-infinity.space · 30/04/2025

base ball cap

0123

Reposted by Jim Fowler

Randall Munroe @xkcd.com · 25/04/2025

PhD Timeline xkcd.com/3081

5865979720444

Jim Fowler @kisonecat.com · 19/04/2025

I really want hycean to rhyme with ocean.

010

Jim Fowler @kisonecat.com · 11/04/2025

historically when was co- first used as a prefix to mean "the dual thing"?

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Jim Fowler @kisonecat.com · 11/04/2025

the K in K(G,n) stands for eilenberg-maKlane

020

Jim Fowler @kisonecat.com · 10/04/2025

eager to watch a movie adaption of the filksong Dawson's Christian

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Jim Fowler @kisonecat.com · 27/03/2025

high protein? i want high dimensional!

a blue box of Kellogg's VECTOR cereal, showcasing the texture of the flakes and its 13g of protein per serving. The words "HIGH PROTEIN" appear on the box. A man with glasses stands beside the box.

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Jim Fowler @kisonecat.com · 24/03/2025

Topology warns me not to push the door open and door close buttons simultaneously, lest I disconnect the door.

050

Jim Fowler @kisonecat.com · 26/02/2025

the Galilean moons of Jupiter! but as a cell phone camera image taken through a telescope.

A poor quality image of Jupiter and its four moons. The background is black, and Jupiter appears as a large white circle, smeared out with a bluish halo. Tilted relative to Jupiter are smaller dots, the four Galilean moons.

060

Jim Fowler @kisonecat.com · 25/02/2025

www.youtube.com/watch?v=GClo... would be a great story to tell in a multivariable calculus class

youtube.com

Seeing the Invisible: The Beauty of Schlieren Imaging

YouTube video by All Things Physics

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Reposted by Jim Fowler

ꭓle Ormsby 𓆙 @e-infinity.space · 23/02/2025

Please help my mug did a topology

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Jim Fowler @kisonecat.com · 23/02/2025

gwern.net/doc/borges/1... reminds me how much I enjoy Borges

gwern.net

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Reposted by Jim Fowler

ꭓle Ormsby 𓆙 @e-infinity.space · 21/02/2025

AMS just released a survey that asks "What [...] will impact the field of mathematics and the mathematical sciences in the next 3-5 years?" I would encourage folks to use the fields provided and 'other' textbox to highlight the political the attacks on higher ed and funding. Check your inbox! 🧮

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Jim Fowler @kisonecat.com · 21/02/2025

Perfect, superperfect, ...

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