Pith Number

pith:IUIYOQ3T

pith:1999:IUIYOQ3T6RGB5FC6AL5E76HCUD

not attested not anchored not stored refs pending

Differences in the fractions of Be stars in galaxies

A. Maeder, E. Grebel, J.-C. Mermilliod

arxiv:astro-ph/9904008 v1 · 1999-04-01 · 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{IUIYOQ3T6RGB5FC6AL5E76HCUD}

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	2026-05-18T02:40:34.804198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4511874373f44c1e945e02fa4ff8e2a0ed7d058e5cfa40fe9cc518da02b952f5

Aliases

arxiv: astro-ph/9904008 · arxiv_version: astro-ph/9904008v1 · doi: 10.48550/arxiv.astro-ph/9904008 · pith_short_12: IUIYOQ3T6RGB · pith_short_16: IUIYOQ3T6RGB5FC6 · pith_short_8: IUIYOQ3T

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/IUIYOQ3T6RGB5FC6AL5E76HCUD \
  | 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: 4511874373f44c1e945e02fa4ff8e2a0ed7d058e5cfa40fe9cc518da02b952f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4dfcbe7010e7c4e9f9ddb340ac1b1d16eef837c8efe7f0bba85c37637bb9f18",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-01T09:02:29Z",
    "title_canon_sha256": "6772724ce4b4575253c9590eb4d793f3d8dcc36664a976d8b6cc66d6518bb2bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904008",
    "kind": "arxiv",
    "version": 1
  }
}