#closedform
Live, measured metrics for the hashtag #closedform from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #closedform
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-10-20 18:56 UTC1 uses by 1 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-10-20 18:56 UTCNo related tags with measured usage found for #closedform.
Live pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-10-20 18:56 UTCEverything below is measured over the latest 4 public posts (spanning ~32088 hours).
Posting hours (UTC)
Languages: English (3) · Chinese (1)
Avg boosts / post: 0
Top of the latest posts
Is there a closed form for this trigamma series? I came across the following infinite series and was wondering whether it can be evaluated in closed form: \[\displaystyle\mathcal S=\sum_{n=1}^{\infty}\left[ \psi'(1-in)-\psi'(1+in)-\frac{2i}
https://blog.gslin.org/archives/2025/12/10/12779/compiler-%e5%b1%85%e7%84%b6%e6%9c%83%e7%9b%b4%e6%8e%a5%e6%8a%8a-loop-%e7%ae%97%e5%87%ba-closed-form-expression-%e5%85%ac%e5%bc%8f%e8%a7%a3/ Compiler 居然會直接把 loop 算出 closed-form expression (公式解
A lattice sum with a surprising closed form: \[\Large\displaystyle\sum_{\substack{(m,n)\in\mathbb Z^2\\(m,n)\neq0}}\dfrac{1}{(m+ni)^4}=\dfrac{\varpi^4}{15}=\dfrac{\Gamma^8\left(\frac14\right)}{960\pi^2}\] #LatticeSum #ClosedForm #Lemniscate
#closedform across platforms
every network with a public tag surfaceFollow #closedform straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/closedform