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theHigherGeometer
@highergeometer.mathstodon.xyz.ap.brid.gy
rimcræftiga |
bespoke constructions in categorified geometry since 2010 |
dude

[bridged from https://mathstodon.xyz/@highergeometer on the fediverse by https://fed.brid.gy/ ]
@skewray a "morphism" is only sometimes a "structure-preserving function". By "map" one generally means something like a continuous or smooth function between geometric objects, but the term is not rigorously defined. So "morphism in the appropriate category of space-like objects" is probably […]
Original post on mathstodon.xyz
mathstodon.xyz
November 13, 2025 at 10:54 PM
I now see there are non-American universities, eg Melbourne, Sydney, Oxford etc. Just not Adelaide 🥲
November 13, 2025 at 12:55 AM
[Long list of North American universities]

University of San Diego
University of Saskatchewan
University of South Carolina
University of South Florida
University of Southern California
University of Sydney
University of Tennessee, Knoxville
University of Texas Health Science Center at Houston […]
Original post on mathstodon.xyz
mathstodon.xyz
November 13, 2025 at 12:54 AM
[Long list of North American universities]

University of California, Riverside
University of California, San Diego
University of California, San Francisco
University of California, Santa Barbara
University of California, Santa Cruz
University of Cambridge
University of Central Florida […]
Original post on mathstodon.xyz
mathstodon.xyz
November 13, 2025 at 12:54 AM
[Long list of North American universities]

Pennsylvania State University
Pitzer College
Pomona College
Portland State University
Pratt Institute
Princeton Theological Seminary
Princeton University
Purdue University
Purdue University Fort Wayne
Queen's University
Reed College
Rutgers University […]
Original post on mathstodon.xyz
mathstodon.xyz
November 13, 2025 at 12:53 AM
[Long list of North American universities]

George Mason University
Georgetown University
Georgia College & State University
Georgia Gwinnett College
Georgia Highlands College
Georgia Institute of Technology
Georgia Southern University
Georgia Southwestern State University
Georgia State […]
Original post on mathstodon.xyz
mathstodon.xyz
November 13, 2025 at 12:52 AM
[Long list of North American universities]

Abraham Baldwin Agricultural College
Albany State University
Allegheny College
American University Library (Washington, DC)
American University of Beirut - الجامعة الأميركيّة في بيروت
Amherst College
Arizona State University
Auburn University
Augusta […]
Original post on mathstodon.xyz
mathstodon.xyz
November 13, 2025 at 12:52 AM
Aha, here's a scan of the book (and a link to the very page about -eth)

https://hdl.handle.net/2027/mdp.39015001569717?urlappend=%3Bseq=57%3Bownerid=13510798883080507-49

This book is simply marvellous! This is one very solid way we know how English pronunciation has changed over time. And […]
Original post on mathstodon.xyz
mathstodon.xyz
November 12, 2025 at 11:33 AM
When it says "the Eilenberg–MacLane theory", that's cute.

"Category theory" the noun describing the field of research didn't (emerge and) take hold for a surprisingly long time!
November 12, 2025 at 5:59 AM
Here's the extracted version of the definition:

"Let \\(S\\) and \\(K\\) be sets, \\(S \subseteq K\\), such that no element of \\(S\\) is a subset of \\(K\\). The *hierarchy* of \\(S\\) is defined to be the minimal set \\(hS\\) such that: (1) \\(S \subseteq hS \subseteq K\\), (2) if \\(A […]
Original post on mathstodon.xyz
mathstodon.xyz
November 12, 2025 at 5:54 AM
And ten days after that record was set, the second-placed person (who had the then-WR only a couple of months backs) has achieved an identical time (recall: this is timed to the frame). So it's not just some fluke occurrence. Two people have gotten to the level of just *11 frames* slower than […]
Original post on mathstodon.xyz
mathstodon.xyz
November 9, 2025 at 10:32 PM