Pith Number

pith:FPGKF6JL

pith:2009:FPGKF6JLQ7MWDKXZGJAS4I7MFH

not attested not anchored not stored refs pending

Observational constraints on a unified dark matter and dark energy model based on generalized Chaplygin gas

Chan-Gyung Park, Hyerim Noh, Jaehong Park, Jai-chan Hwang

arxiv:0910.4202 v1 · 2009-10-22 · astro-ph.CO · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FPGKF6JLQ7MWDKXZGJAS4I7MFH}

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	2026-07-04T17:26:26.264219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bcca2f92b87d961aaf932412e23ec29c9c0bdbd5a4f88fad1190aa98f88f6d1

Aliases

arxiv: 0910.4202 · arxiv_version: 0910.4202v1 · doi: 10.48550/arxiv.0910.4202 · pith_short_12: FPGKF6JLQ7MW · pith_short_16: FPGKF6JLQ7MWDKXZ · pith_short_8: FPGKF6JL

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/FPGKF6JLQ7MWDKXZGJAS4I7MFH \
  | 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: 2bcca2f92b87d961aaf932412e23ec29c9c0bdbd5a4f88fad1190aa98f88f6d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59e085ed435a317803fa272ffff0ac3c37a9967c9b60471859b6c3d8379aeca5",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-22T00:09:38Z",
    "title_canon_sha256": "c0f416541ca148aa6c090675ab108ff56c485fde28a88dadf69b9e49385e320c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.4202",
    "kind": "arxiv",
    "version": 1
  }
}