#summationconvention
Live, measured metrics for the hashtag #summationconvention from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #summationconvention
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Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-07-29 18:42 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 2026-07-29 18:42 UTCNo related tags with measured usage found for #summationconvention.
Live pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-07-29 18:42 UTCEverything below is measured over the latest 1 public posts.
Posting hours (UTC)
Languages: English (1)
Avg boosts / post: 0
Used together with
No co-used tags in the sample.
Top of the latest posts
Does the #SummationConvention make it obvious that \(\operatorname{tr}(AB) = \operatorname{tr}(BA)\)? It's just \[ a_{ij}b_{ji} = b_{ji}a_{ij}. \] Is there a coordinate-free proof?
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/summationconvention