Pith Number

pith:IMT56QWR

pith:2009:IMT56QWRE7K2NOENS4QUYH4SF6

not attested not anchored not stored refs pending

New method to constrain the relativistic free-streaming gas in the Universe

TianYang Xia, Wen Zhao, Yang Zhang

arxiv:0905.3223 v3 · 2009-05-20 · astro-ph.CO · astro-ph.HE · gr-qc · hep-ph · 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{IMT56QWRE7K2NOENS4QUYH4SF6}

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	2026-05-18T02:34:46.303855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4327df42d127d5a6b88d97214c1f922fb7de77a3df470d451114525d535afcc5

Aliases

arxiv: 0905.3223 · arxiv_version: 0905.3223v3 · doi: 10.48550/arxiv.0905.3223 · pith_short_12: IMT56QWRE7K2 · pith_short_16: IMT56QWRE7K2NOEN · pith_short_8: IMT56QWR

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/IMT56QWRE7K2NOENS4QUYH4SF6 \
  | 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: 4327df42d127d5a6b88d97214c1f922fb7de77a3df470d451114525d535afcc5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2eeb0af61f01e37bf72161b0144373d65812a7e595a038af417b7c76f170199a",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-20T10:11:54Z",
    "title_canon_sha256": "f392240602d567ed3a8db1af01afded061214d3d95557cecb8da815e414c1ac9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.3223",
    "kind": "arxiv",
    "version": 3
  }
}