#nullset
Live, measured metrics for the hashtag #nullset from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #nullset
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 2026-08-01 20:29 UTC0 uses by 0 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 2026-08-01 20:29 UTCNo related tags with measured usage found for #nullset.
Live pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-08-01 20:29 UTCEverything below is measured over the latest 2 public posts (spanning ~11331 hours).
Posting hours (UTC)
Languages: English (2)
Avg boosts / post: 13
Used together with
Top of the latest posts
Evolution of the notation for the empty set: 0 - George Boole 🇬🇧 (1847) 𝑂 - Georg Cantor 🇩🇪 (1880) {} - Gottlob Frege 🇩🇪 (1882) Λ - Giuseppe Peano 🇮🇹 (1889) ∅ - Andre Weil 🇫🇷 (1939) "Much later, my own part in these discussions e
"“It’s lasted for almost 20 years, and probably will stick forever, as an homage to the nerdy, nonconformist nature of New College,” the Null Set webpage once said. This webpage has since been removed from the official New College website.
What “nullset” means
WikipediaIn mathematical analysis, a null set in is a Lebesgue measurable set of real numbers that has measure zero. This can be characterized as a set that can be covered by a countable union of intervals of arbitrarily small total length.
“Null set” on Wikipedia (CC BY-SA) →#nullset across platforms
every network with a public tag surfaceFollow #nullset 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/nullset