Pith Number

pith:UOSIA3CO

pith:2005:UOSIA3COXV2HZWNKGTU474GJRF

not attested not anchored not stored refs pending

The baryon content of the Universe

M. Persic, P. Salucci

arxiv:astro-ph/0502178 v1 · 2005-02-09 · 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{UOSIA3COXV2HZWNKGTU474GJRF}

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	2026-05-18T01:40:34.471935Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3a4806c4ebd747cd9aa34e9cff0c989472e47a61508a0441d50f515c378e881

Aliases

arxiv: astro-ph/0502178 · arxiv_version: astro-ph/0502178v1 · doi: 10.48550/arxiv.astro-ph/0502178 · pith_short_12: UOSIA3COXV2H · pith_short_16: UOSIA3COXV2HZWNK · pith_short_8: UOSIA3CO

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/UOSIA3COXV2HZWNKGTU474GJRF \
  | 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: a3a4806c4ebd747cd9aa34e9cff0c989472e47a61508a0441d50f515c378e881

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18c30b1212270dd2fb61b28e6cf19f821b42cf7ba993dd490bae688cb7b66c1a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-02-09T10:32:34Z",
    "title_canon_sha256": "73e3df9d421b6d5de261063e1dda7b32e750cbd12b66eca634159a0ee759556a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0502178",
    "kind": "arxiv",
    "version": 1
  }
}