Pith Number

pith:WBGRNVFM

pith:2009:WBGRNVFMQRDZU363UQ6OVP7BYE

not attested not anchored not stored refs pending

Effects of the variation of fundamental constants on Pop III stellar evolution

Alain Coc, Elisabeth Vangioni, Georges Meynet, Jean-Philippe Uzan, Keith A. Olive, Pierre Descouvemont, Sylvia Ekstrom

arxiv:0911.2420 v1 · 2009-11-12 · astro-ph.SR · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WBGRNVFMQRDZU363UQ6OVP7BYE}

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	2026-05-18T02:34:11.086143Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b04d16d4ac84479a6fdba43ceabfe1c11e3877c5c0eaf448af221c252658ba87

Aliases

arxiv: 0911.2420 · arxiv_version: 0911.2420v1 · doi: 10.48550/arxiv.0911.2420 · pith_short_12: WBGRNVFMQRDZ · pith_short_16: WBGRNVFMQRDZU363 · pith_short_8: WBGRNVFM

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/WBGRNVFMQRDZU363UQ6OVP7BYE \
  | 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: b04d16d4ac84479a6fdba43ceabfe1c11e3877c5c0eaf448af221c252658ba87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45c910443afa16b9559c66e81c555cf7c335c95bd24068ca0d90c5a83fc717f1",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-11-12T16:08:46Z",
    "title_canon_sha256": "8866dd36b688addc942c931cefc8604cb330ef29dbf233e9e53fb57dd855f8a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2420",
    "kind": "arxiv",
    "version": 1
  }
}