Pith Number

pith:JV4WNZP7

pith:2009:JV4WNZP75U3KZHEQZMQYOGQVQV

not attested not anchored not stored refs pending

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Martin Elvis (CfA), Philip F. Hopkins (Berkeley)

arxiv:0904.0649 v2 · 2009-04-03 · astro-ph.CO · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JV4WNZP75U3KZHEQZMQYOGQVQV}

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	2026-05-18T02:14:07.609018Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d7966e5ffed36ac9c90cb21871a1585560c1ebb9123783f0031ccc2fa13aeff

Aliases

arxiv: 0904.0649 · arxiv_version: 0904.0649v2 · doi: 10.48550/arxiv.0904.0649 · pith_short_12: JV4WNZP75U3K · pith_short_16: JV4WNZP75U3KZHEQ · pith_short_8: JV4WNZP7

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/JV4WNZP75U3KZHEQZMQYOGQVQV \
  | 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: 4d7966e5ffed36ac9c90cb21871a1585560c1ebb9123783f0031ccc2fa13aeff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8665f87777d4897847007757fac1f92fde7268a3fd28d95cf1d05151022ac8c",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-03T20:05:13Z",
    "title_canon_sha256": "e88e77788b8af56b9967c5b7dc62cb4ec1d466ec0f03b03b03eedf764051ea74"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0649",
    "kind": "arxiv",
    "version": 2
  }
}