Pith Number

pith:F2X63NCU

pith:2005:F2X63NCUIZBHOFCMYV25PI33H6

not attested not anchored not stored refs pending

Dark Energy - Dark Matter Unification: Generalized Chaplygin Gas Model

Orfeu Bertolami

arxiv:astro-ph/0504275 v2 · 2005-04-12 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F2X63NCUIZBHOFCMYV25PI33H6}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:37:00.633765Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2eafedb454464277144cc575d7a37b3f947a07a3eb9e537d03ab6121fd2ec179

Aliases

arxiv: astro-ph/0504275 · arxiv_version: astro-ph/0504275v2 · doi: 10.48550/arxiv.astro-ph/0504275 · pith_short_12: F2X63NCUIZBH · pith_short_16: F2X63NCUIZBHOFCM · pith_short_8: F2X63NCU

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/F2X63NCUIZBHOFCMYV25PI33H6 \
  | 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: 2eafedb454464277144cc575d7a37b3f947a07a3eb9e537d03ab6121fd2ec179

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70c8644d8c3408d130a86fc8eee5ad00e0cdfe5b80092fd5224fe047704a9a01",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-04-12T18:44:06Z",
    "title_canon_sha256": "e7a31f0fbb08b1bcf64abcc538cbd0d5404c347aa2d183cf757088eda687498f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0504275",
    "kind": "arxiv",
    "version": 2
  }
}