#counterexample
Live, measured metrics for the hashtag #counterexample from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #counterexample
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 · mastodon.online (Mastodon public tags API) · fetched 2026-10-09 00:16 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mastodon.online (Mastodon public search API) · fetched 2026-10-09 00:16 UTCLive pulse
measured · mastodon.online (Mastodon tag timeline) · fetched 2026-10-09 00:16 UTCEverything below is measured over the latest 12 public posts (spanning ~41509 hours).
Posting hours (UTC) — busiest: 07:00
Languages: English (12)
Avg boosts / post: 0.9
Top of the latest posts
A 216-Character Counterexample Ends an 87-Year-Old Math Conjecture Follow @1ban_news for daily coverage. https://1ban.news/jacobian-conjecture-counterexample/ #1ban #jacobian #conjecture #counterexample #science #research
Rohan Paul (@rohanpaul_ai) AI가 다항식 사상(polynomial maps) 관련 87년 된 수학 추측에 대해 인간이 찾지 못한 반례를 발견했다는 내용이다. 출력값으로부터 원래 입력을 항상 유일하게 복원할 수 있는지를 다루는 문제로, AI의 수학 탐색·반례 생성 능력이 순수수학 연구에 적용된 사례로 주목할 만하다. https://x.com/rohanpaul_ai/status/20798864227527562
A digestion of the Jacobian conjecture counterexample https://terrytao.wordpress.com/2026/07/21/a-digestion-of-the-jacobian-conjecture-counterexample/ Comments: https://news.ycombinator.com/item?id=48998362 #HackerNews #JacobianConjecture #
What “counterexample” means
Wiktionary · Wikipediacounterexample
- nounAn exception to a proposed general rule; a specific instance of the falsity of a universally quantified statement.
A counterexample is a specific example that contradicts a claim, hypothesis, or generalization. In logic a counterexample disproves a universally stated claim, and does so rigorously in the fields of mathematics and philosophy. For example, the statement that "student John Smith is not lazy" is a counterexample to the generalization "students are lazy", and both a counterexample to, and disproof of, the universally quantified "all students are lazy."
“Counterexample” on Wikipedia (CC BY-SA) →#counterexample across platforms
every network with a public tag surfaceFollow #counterexample 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/counterexample