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Christina Richards

@cdrichards@mathstodon.xyz
mastodon 4.7.2
  • Open on mathstodon.xyz

Good at computer, kind to animals 🏳️‍🌈🏳️‍⚧️

I’m a lesbian software engineer with a PhD in PL theory. I job in industry, mainly building reliable distributed systems for privacy and data protection, but this space is for doing things with words.

Personal account, opinions mine. Follow requests welcome.

#queer #trans #nobot

48 Followers
100 Following
41 Posts
Joined March 02, 2026
Pronouns:
she/her
Website:
https://mauka.net/cdrichards
Open post
Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@carrideen I like the window we get into horse epistemology. A horse knows-how (to move the heavy thing) and knows-that (the fire cake is dangerous), but it also knows-with-face (the dreamed-of cake).
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Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@alexr@tilde.zone @astory@tilde.zone @mrkwlsn@mastodon.social there is only one topic on Mastodon and it’s intensional vs. extensional equality
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Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@lindsey unison
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Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@andrejbauer@mathstodon.xyz “it’s my nature,” said the scorpion, as they both sank into the water
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@chrisamaphone they pumice the many for the climbs of the few.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@mc@mathstodon.xyz hm, no references to Lawvere’s ETCS (1964) or its recent presentation by Leinster in Rethinking Set Theory (2014) https://arxiv.org/abs/1212.6543 A educated hobbyist’s opinion: the problem with set theory as traditionally presented is not that it’s too powerful, although it may be that, too; it’s that for most mathematics other than set theory itself, it demands awkward, low-level encodings.
Rethinking set theory
arXiv.org

Rethinking set theory

Mathematicians manipulate sets with confidence almost every day, rarely making mistakes. Few of us, however, could accurately quote what are often referred to as "the" axioms of set theory. This suggests that we all carry around with us, perhaps subconsciously, a reliable body of operating principles for manipulating sets. What if we were to take some of those principles and adopt them as our axioms instead? The message of this article is that this can be done, in a simple, practical way

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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@carrideen me too, horse, me too
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@carrideen@c18.masto.host my kitty of yore used to make a face (wrinkled upper lip, mouth slightly open) like she was smelling something terrible and needed ALL of it. I wish I had a picture. Instead, here she is « en boîte »
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@julesh@mathstodon.xyz the London conurbation is the greatest London. Dually, the City of London is the London nurbation
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@jonmsterling I once applied for job that revealed itself, an interview at a time, to be co-extensive with “Nix sysadmin”. I wish that company well.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@carloangiuli @jonmsterling filing this thread under “Dr. Funext, or: How I Learned to Stop Worrying and Love the Xi Rule”
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@mc my only consistent gripe is the poorer bookmark UX relative to Firefox and Chrome. It’s too easy to add duplicate bookmarks, because bookmarked URLs aren’t flagged as such in the URL bar.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@aparrish pov: there’s peanut butter in the ansible again
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Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@carrideen @SecondUniverse this New Yorker cover but horse and cake https://condenaststore.com/featured/missed-connection-adrian-tomine.html?product=art-print
Missed Connection Art Print by Adrian Tomine
Conde Nast

Missed Connection Art Print by Adrian Tomine

Purchase an art print of the painting "Missed Connection" by Adrian Tomine. A woman and several passengers read books on a subway. The setting captures a typical urban commute with diverse individuals absorbed in their reading.

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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 4mo ago
Replying to
@cxli@scholar.social congrats!
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 4mo ago
Replying to
@aparrish@friend.camp tsk tsk no bunker under the mountain for you
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@carrideen@c18.masto.host sometimes there’s just a flavor, you know?
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@chrisamaphone@hci.social tried to think of examples where you can negate pragmatics to decipher semantics and they’re all language-barrier romcom bits. (Alice and Bob are mutually unintelligible. Alice makes a fool of herself to attract the attention of Bob. Bob laughs and says to Alice, “You dumbass.”)
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@lindsey good thing you specified computer programs else I’d have said Paul Wylie’s 1992 silver medal performance
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@typeswitch@gamedev.lgbt omg the first- vs second/higher-order diss literature is so captivating. You can see historic battles unfold in real-time on the f.o.m. list archives: https://fomarchive.ugent.be/1999-March/002864.html
fomarchive.ugent.be

FOM: second-order logic is a sterile myth

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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@jonmsterling @stuebinm OSS as unpaid internship, compensated in “exposure”. Is it worth pursuing? If you have to ask, you can’t afford it.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@chrisamaphone@hci.social @ah@goto.boserup.eu @simrob@social.wub.site there’s nothing psilly about psyllium husk
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@byorgey well said, indeed. Thank you.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@simrob @chrisamaphone I can’t read this without thinking: frog-blast the vent core
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Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@chrisamaphone you could read “down-hosing” as making a nod to the Augean Stables
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Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@astory@tilde.zone @alexr@tilde.zone @mrkwlsn@mastodon.social but if there are no time signatures, there are perforce no “odd time signatures” nor technically proficient hair bands nor 20-minute songs about hobbits. What will power me^W future comrades through the day?
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@jonmsterling amusing to imagine doing this with actual calendar primitives, mapping “accept” to “like” and so on.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@kevin maybe @raph has pointers?
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Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@chrisamaphone apposite!
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@chrisamaphone it’s a guanábana, mais non?
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@chrisamaphone noooo pink pony club earworm activated
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Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@jcreed consummate
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Christina Richards @cdrichards@mathstodon.xyz
· 6mo ago
Replying to
@jcreed res hipsa loquitur
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Christina Richards @cdrichards@mathstodon.xyz
· 3mo ago
Replying to
@0xabad1dea@infosec.exchange how many dissertations is too many? Asking for a friend
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@mc I also wonder how Apple-centric it is, apart from only being available on Apple devices, and requiring an Apple Account for desktop-mobile sync. I haven’t fired up wireshark to scan for suspect connections, for example. I made a call that, after turning on e2ee for synced data, I could accept the risk of ID-provider shenanigans.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 3mo ago
Replying to
@0xabad1dea@infosec.exchange I read “AC” as “Axiom of Choice” and braced myself for a rant about dismantling and reassembling spheres
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@alexr@tilde.zone @astory@tilde.zone @mrkwlsn@mastodon.social I see what you mean but I disagree. The forgetful functor is not the identity, after all.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@sliminality@types.pl learned circa 7th grade (US public school), along with “multiplying both sides of an inequality by a negative number flips the inequality”. Shoutout to Mr. Freiberg, who also taught us the Fizz Buzz game.
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Open post
Christina Richards @cdrichards@mathstodon.xyz
· 5mo ago
Replying to
@mc@mathstodon.xyz I want to ask, who is the customer for this product. “Core” mathematicians should be able to ignore foundations, and I assume they mostly do. Set theorists are fine, thanks. For non-set theorists interested in foundations, a set that includes me, the literature shows lots of ways to mix and match axioms if e.g. you don’t like arbitrary choice, or if Replacement gives you a bad vibe. I do see some value in narrowing the gap between math-as-encoded (in a foundational system) and math-as-practiced, but that’s not what’s happening here, AFAICT.
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