Pith Number

pith:EZMGQZKO

pith:1997:EZMGQZKOXNML5IPICBXJJGRLCA

not attested not anchored not stored refs pending

The entropy of elliptical galaxies in Coma: a clue for a distance indicator

Daniel Gerbal, Gastao B. Lima Neto, Huub Verhagen, Isabel Marquez

arxiv:astro-ph/9701078 v2 · 1997-01-14 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EZMGQZKOXNML5IPICBXJJGRLCA}

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	2026-05-18T01:22:58.842691Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

265868654ebb58bea1e8106e949a2b101127415bfbda70fc735a010d3e631672

Aliases

arxiv: astro-ph/9701078 · arxiv_version: astro-ph/9701078v2 · doi: 10.48550/arxiv.astro-ph/9701078 · pith_short_12: EZMGQZKOXNML · pith_short_16: EZMGQZKOXNML5IPI · pith_short_8: EZMGQZKO

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/EZMGQZKOXNML5IPICBXJJGRLCA \
  | 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: 265868654ebb58bea1e8106e949a2b101127415bfbda70fc735a010d3e631672

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "99334f94bca747877542dd03bfa43dd6b1cd7df5fce5438c3e054cb13f9aabf0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-01-14T16:33:56Z",
    "title_canon_sha256": "21eabea1715669b66516f4149eebf8255192bcf4fb3fe549d8bd6c463cddb009"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9701078",
    "kind": "arxiv",
    "version": 2
  }
}