Pith Number

pith:2Z7RBILL

pith:2020:2Z7RBILLQOCAMZF2JUFRLTA3XD

not attested not anchored not stored refs pending

The Ursa Major Association of Galaxies. VI: A relative dearth of gas-rich dwarf galaxies

E. Busekool, J.M. van der Hulst, M.A.W. Verheijen, M.A. Zwaan, N. Trentham, R.B. Tully

arxiv:2012.03648 v1 · 2020-12-07 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2Z7RBILLQOCAMZF2JUFRLTA3XD}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T01:57:32.400931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d67f10a16b83840664ba4d0b15cc1bb8e7c828a1ad655cd0d575993b0b1c3d33

Aliases

arxiv: 2012.03648 · arxiv_version: 2012.03648v1 · doi: 10.48550/arxiv.2012.03648 · pith_short_12: 2Z7RBILLQOCA · pith_short_16: 2Z7RBILLQOCAMZF2 · pith_short_8: 2Z7RBILL

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/2Z7RBILLQOCAMZF2JUFRLTA3XD \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d67f10a16b83840664ba4d0b15cc1bb8e7c828a1ad655cd0d575993b0b1c3d33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25e1d2e98e7e7174d2dd17d2a7f3df4918464704c9f862e839488f8628f6f529",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-12-07T13:05:42Z",
    "title_canon_sha256": "cb495ac2bedb86dea2802041825dabb3b0bac8aac7acaa306c8ff83bc0c55cb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.03648",
    "kind": "arxiv",
    "version": 1
  }
}