Pith Number

pith:V4CALSJB

pith:2003:V4CALSJBQIGJQHRTGBDM5RPGDN

not attested not anchored not stored refs pending

WMAP Constraints on the Generalized Chaplygin Gas Model

A.A. Sen, M.C. Bento, O. Bertolami

arxiv:astro-ph/0303538 v2 · 2003-03-24 · 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{V4CALSJBQIGJQHRTGBDM5RPGDN}

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	2026-05-18T01:40:39.170908Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af0405c921820c981e333046cec5e61b5a0787a551d0b410cfbe5c0e30233fb6

Aliases

arxiv: astro-ph/0303538 · arxiv_version: astro-ph/0303538v2 · doi: 10.48550/arxiv.astro-ph/0303538 · pith_short_12: V4CALSJBQIGJ · pith_short_16: V4CALSJBQIGJQHRT · pith_short_8: V4CALSJB

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/V4CALSJBQIGJQHRTGBDM5RPGDN \
  | 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: af0405c921820c981e333046cec5e61b5a0787a551d0b410cfbe5c0e30233fb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22ba764ef48a1a5cc24960dcfc8bbe2288271d0ed27c577efada9af8e61e0dcf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-03-24T18:16:12Z",
    "title_canon_sha256": "5531e675b67b2cdcd8be42f0abf15c635534abfe277f6c28967c3251644d669f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0303538",
    "kind": "arxiv",
    "version": 2
  }
}