Nobrowser @nobrowser@mathstodon.xyz

“User Interface”? You mean clicking randomly on the ⁝ and ☰ and ⚙️ buttons trying to figure out what's in each one?

Threelds, https://cp4space.hatsya.com/2022/05/25/threelds/

I have no idea whether it's useful for anything, but a threeld is a pair of fields where the multiplication operation on the inner one forms the multiplication on the outer one. The finite ones have inner order 3 and outer order 2, or inner order a Mersenne prime and outer order the adjacent power of two, but there also exist infinite ones with inner field of characteristic 0 and outer of characteristic 2.

Try our app, it's exactly like our website except it tracks you everywhere you go forever in exchange for not always nagging you to try the app.

https://www.priv.gc.ca/en/opc-news/news-and-announcements/2022/nr-c_220601/

Ship in a Klein bottle

Progress in polyhedral combinatorics: convex polytopes cannot have fewer intermediate-dimensional faces than the smaller of their numbers of facets or vertices. https://arxiv.org/abs/2204.02568, via https://gilkalai.wordpress.com/2022/04/29/joshua-hinman-proved-baranys-conjecture-on-face-numbers-of-polytopes-and-lei-xue-proved-a-lower-bound-conjecture-by-grunbaum/

Data Science and the High School Math Curriculum: https://sites.google.com/view/mathindatamatters/home, an open letter by California academics (including me) asserting that high school algebra is essential for STEM, and data science (albeit valuable) cannot replace it.

The context is a push to water down high school math, eliminate advanced tracks, and replace math by math appreciation, in the misguided hope that this will improve diversity and remove inequities.

Reactions: https://scottaaronson.blog/?p=6389, https://news.ycombinator.com/item?id=31170431

New math post on my blog: Unordered pairs and the axiom of binary choice https://blog.plover.com/math/wiener-pairs-6.html

Longstanding but still-active theoretical CS blog "Gödel's Lost Letter and P=NP" makes a roundup of other still-active math and theoretical CS blogs: https://rjlipton.wpcomstaging.com/2022/04/05/blogs-that-are-current/

Sometimes I wish my superpower was the ability to make "PEDESTRIANS HAVE RIGHT OF WAY IN ALL CROSSWALKS, MARKED AND UNMARKED" appear in the visual field of drivers for up to three days after zooming through an intersection

I've been working on this for three months and it's finally done. 78 pages on the history of leather, sluts, and families at US Prides, from 1965 to 1995. Includes background on Pride as a polyvocal celebration and leather as a queer subculture; multifarious sexual and gender expression at Pride; the Lesbian Sex Wars; reaction from the right; and the interplay of radical and normalizing forces within LGBTQ activism.

https://aphyr.com/posts/358-a-history-of-leather-at-pride-1965-1995

We've written an open letter to @WhiteHouse to address concerns around the recent meeting about FOSS infrastructure. We believe there should be more of a voice given to consumer rights and not just addressing the needs of Big Tech.

https://sfconservancy.org/blog/2022/feb/01/biden-foss-security-sbom-copyleft-right-to-repair/

So frustrating that many gmail users are unaware that emails from small independent mail servers are regularly dumped into spam, have attachments and/or links dropped, and then get annoyed at me for it. Especially in non-tech circles, they often don't believe it's even possible.

You can find plenty of online stories celebrating the release into the public domain of Winnie the Pooh (text, not film), Hemingway's The Sun Also Rises, etc: see https://boingboing.net/2022/01/01/winnie-the-pooh-is-now-officially-public-domain.html for one. But the situation for Ludwig Wittgenstein is more complicated. All his own writing is now public domain in life+70 countries, but the work of later editors might not be. Michele Lavazza explains: https://www.wittgensteinproject.org/w/index.php?title=Project:Why_are_some_of_Wittgenstein%E2%80%99s_texts_missing_from_this_website%3F, via https://news.ycombinator.com/item?id=29760747

Born three months before her brother? https://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/2021-12-28/Serendipity

I was amused by this example of how errors or discrepancies (in this case, in the birthdate of a pianist) can propagate through historical sources (including Wikipedia) and how the circularity of that propagation can hamper efforts to determine which of two inconsistent claims is the incorrect one.

Ocean rain, Mendocino, Christmas afternoon

You're probably familiar with Little Free Libraries (https://littlefreelibrary.org/), outdoor bookshelf-boxes on sticks that have popped up like mushrooms all over neighborhoods like mine (we have five) to make it easy to find good homes for books you'd like others to find or don't want to keep yourself. One of our neighbors has taken it a step further, making a little free dog-stick library, in active use judging by its changing numbers of sticks from week to week.