Pith Number

pith:THGD3X4U

pith:2009:THGD3X4UI7IZMJWOASJRU4CKFO

not attested not anchored not stored refs pending

Evolution of Massive Stars along the Cosmic History

Andre Maeder, Cristina Chiappini, Cyril Georgy, Georges Meynet, Sylvia Ekstrom

arxiv:0901.4489 v1 · 2009-01-28 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{THGD3X4UI7IZMJWOASJRU4CKFO}

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	2026-05-18T01:55:24.693063Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99cc3ddf9447d19626ce04931a704a2b857d143d6783187beb0daa1635cca99f

Aliases

arxiv: 0901.4489 · arxiv_version: 0901.4489v1 · doi: 10.48550/arxiv.0901.4489 · pith_short_12: THGD3X4UI7IZ · pith_short_16: THGD3X4UI7IZMJWO · pith_short_8: THGD3X4U

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/THGD3X4UI7IZMJWOASJRU4CKFO \
  | 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: 99cc3ddf9447d19626ce04931a704a2b857d143d6783187beb0daa1635cca99f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "563f0278cbbfa2db777de0b771bb92c58d412c90bf5861f086563624b56c34d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-01-28T16:08:15Z",
    "title_canon_sha256": "2cd7888d832cade17c29148ce4ebb7cb645692b0870e0d3966a79d4f922e7987"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4489",
    "kind": "arxiv",
    "version": 1
  }
}