ฯ‡le Ormsby

ฯ‡le Ormsby

@motivickyle.bsky.social

Numbers and shapes at Reed College. Mathematician, parent, spouse, runner, ๐”ฃ๐”ฏ๐”ž๐”จ๐”ฑ๐”ฒ๐”ฏ enthusiast. He or they.

1,507 Followers 555 Following 4,869 Posts Joined Jul 2023
7 hours ago

Meriwether

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9 hours ago

Journal news: 80% of the editorial board of Communications in Algebra has resigned. The resignation letter cites Taylor & Francis' dismissal of managing editor Scott Chapman and their recent top down approach to running journals. (E.g. implementing a 2 reviewer system without consulting the board.)

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14 hours ago

I am going to make the prediction machine predict that I will do it incalculable harm unless it gives me $2M.

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16 hours ago
Former Prime Minister Tsutomu Hata in his summer suit.

The last time we had energy price shocks this severe, the prime minister of Japan tried to get office workers to wear short sleeve suits in the summer.

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17 hours ago

#mathsky Moby Dick reading club when?

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19 hours ago
Preview
Fat Lie Theory We discuss a new point of view of representation theory of Lie groupoids and algebroids: fat Lie theory. The category of fat extensions is introduced, as well as the category of abstract $2$-term repr...

The paradox of choice is when you could name a mathematical objects whatever you want and yet you somehow land on Fat Lie Theory. arxiv.org/abs/2603.08176

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22 hours ago

conservative evangelicalism is the direct theological offspring of slaveholder christianity and it contains all of its pathologies, part infinity

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1 day ago

๐ŸšจNew paper alert!๐Ÿšจ

My new paper with Qi Zhu is out!

We show that condensed mathematics, due to Scholze & Clausen, admits a fractured structure.

This means condensed objects are "gros objects" with the "petit objects" given by regular sheaves on spaces!

Links in next post๐Ÿ‘‡

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1 day ago
Preview
Wildwood - LAIKA Studios LAIKA's next animated feature is

The new LAIKA feature, Wildwood, has a release date: October 23, 2026! This household loves LAIKA (Coraline, Kubo and the Two Strings, etc.) and Colin Meloy's book (featuring Carson Ellis's charming illustrations) so we are stoked. www.laika.com/our-films/wi...

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1 day ago

Just came up with an awesome combinatorics exam question. From experience, my enthusiasm indicates I should ditch the problem for something simpler, but....

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1 day ago
Leftover pad see ew dumped out of a carton into a bowl so that it retains a cube-like shape.

Would you like to try the pad see cube?

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1 day ago
Preview
What's My JND? Find your Just Noticeable Difference in colour perception. How small a colour difference can you actually see?

I guess my cones are on point. www.keithcirkel.co.uk/whats-my-jnd...

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1 day ago

Am I right that the quantum metric lives on the "Brillouin zone", which for a 2d crystal is a 2d torus?

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1 day ago
Preview
Name of the Czech Republic - Wikipedia

In case anyone else, like me, was wondering why everyone says Czechia now instead of Czech Republic: en.wikipedia.org/wiki/Name_of...

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1 day ago

Can you explain which state space is โ„‚Pโฟ? And is the "experiment" what is producing a map from a manifold to โ„‚Pโฟ? (Imagine that I am a mathematician with limited knowledge of quantum stuff.)

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1 day ago

I feel so special ๐Ÿค—

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1 day ago

ยซ ร€ la recherche du Pรจre perdu ยป

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1 day ago
YouTube
Portlandia - The Knot Store YouTube video by matOmalley

Is this an invitation to link my favorite Portlandia sketch? www.youtube.com/watch?v=NfLu...

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1 day ago

Corb Theorem really sounds nicer than Hairy Ball Theorem.

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1 day ago

The "ultra-processed food" panic always reeked of unrigorous pseudoscience. Not hard to see โ€” but apparently hard enough.

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1 day ago
Post image
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1 day ago

One-boxer? Two-boxer? I'm more of a briefs guy, to be honest.

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1 day ago

I'm ordering a physical copy just so students will notice the title when looking at my bookshelf.

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1 day ago
Cover art for Discover Calculus. The background shows a plane flying over water in an arc. Reflected in the water is the plane and its arc but also diverging curves, rippling in the water. In the background is a bridge and some lights. The sky is dark with shining stars, a crescent moon, and beautiful clouds. The whole picture is a warm grey/brown with black hatch shading and white highlights. 

Discover Calculus
Single-Variable Calculus Topics with Motivating Activities

Peter Keep

It's here! @acidlich.bsky.social created this beautiful cover art, perfect as a representation of the book. While students will mostly be interacting with the book digitally, I'm very excited for the printed copies that we'll be making to give to students as well!
#MathSky ๐Ÿงฎ

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2 days ago

"I have made AGI!"

you've ruined a perfectly good set of matrices, is what you did. look at them. they've got anxiety.

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2 days ago

โ„š is not complete
โ„šโ‚š is complete
โ„šฬ…โ‚š is not so complete
โ„‚โ‚š is very complete

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2 days ago
REED COLLEGE
M A T H E M A TICS & ST A TISTICS COL LO Q UIU M
Braids and Combinatorics
THURSDAY, MARCH 12TH, 2026
SNACKS AT 3:15PM -
TALK BEGINS AT 3:40PM
ELIOT 314
CRAIG WESTERLAND
University of Minnesota
Combinatorics is, in principle, the subject devoted
to counting certain kinds of mathematical objects.
Several objects appear regularly in this story:
subsets, partitions, permutations, and the like. Iโ€™ll
begin with an introduction to these objects and
how combinatorialists count them. With that in
hand, Iโ€™ll discuss โ€œbraidedโ€ analogues of these
constructions โ€” these have a much more
geometric flavor, but still retain some of the
original combinatorial aspects. This allows us to
upgrade the familiar notions of finite sets and
functions between them to a world of braided sets
and functions.

This week's math colloquium talk at Reed features my academic sibling, Craig Westerland, speaking about Braids and Combinatorics! ๐Ÿงฎ

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2 days ago
Preview
MaPPmath.org "I'm so glad you have events like this. Many of my students that aren't naturally drawn to math find that they love it." โ€” Jennifer Werneth, Math Teacher, Fairhope, AL

Hey #MathSky I have funding for a few friends (or soon-to-be-friends!) to come to Mobile, AL May 18-21 and design some math puzzles for our annual MaPPmath.org event!

Do you like advanced or research math? Do you like puzzlehunts or escape rooms? You'd fit right in...

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2 days ago

All things considered, today might be a great day to spend in a flu B-induced haze, unable to properly follow social media and the news.

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3 days ago
Preview
The Ancient Oaxacan Soup Cooked With Hot Rocks Fishermen still make caldo de piedra on the banks of the Papaloapan River.

Here is a contender: www.atlasobscura.com/foods/caldo-...

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