#ultrafinitism
Live, measured metrics for the hashtag #ultrafinitism from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
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measured · fosstodon.org (Mastodon public tags API) · fetched 2026-07-28 16:44 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
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measured · fosstodon.org (Mastodon public search API) · fetched 2026-07-28 16:44 UTCLive pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-07-28 16:44 UTCEverything below is measured over the latest 3 public posts (spanning ~30481 hours).
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Languages: English (3)
Avg boosts / post: 0.3
Top of the latest posts
I'm still pondering Ed Nelson's unusual idea that towers of exponentials might not really refer to numbers at all. The logic depends on something very interesting. Normally we think of ∀𝑚.∀𝑛.𝑃(𝑚,𝑛) ∀𝑛.∀𝑚.𝑃(𝑚,𝑛) ∀〈𝑚,𝑛〉.𝑃(𝑚,𝑛)
“Something that doesn’t actually exist can still be useful”*… Gregory Barber on ultrafinitism, a philosophy that rejects the infinite. Ultrafinitism has long been dismissed as mathematical heresy, but it is also producing new insights in ma
(3/7) - Large cardinal axioms in #SetTheory are often equivalent to asserting that there exists *well-founded* models with various properties, which gives you access to more induction. - In Predicative Arithmetic by Edward Nelson (https://w
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