Pith Number

pith:H4DFLQRL

pith:1996:H4DFLQRLVPHJR3F6ALIDBR5SMB

not attested not anchored not stored refs pending

Deuterium abundance and cosmology

(2) Univ. Chicago), A. Vidal-Madjar (1), M. Lemoine (2) ((1) IAP, R. Ferlet (1)

arxiv:astro-ph/9612020 v1 · 1996-12-02 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H4DFLQRLVPHJR3F6ALIDBR5SMB}

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	2026-05-18T01:07:40.475481Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f0655c22babce98ecbe02d030c7b260777422776a180aaf8bf32e39f3f0c379

Aliases

arxiv: astro-ph/9612020 · arxiv_version: astro-ph/9612020v1 · doi: 10.48550/arxiv.astro-ph/9612020 · pith_short_12: H4DFLQRLVPHJ · pith_short_16: H4DFLQRLVPHJR3F6 · pith_short_8: H4DFLQRL

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/H4DFLQRLVPHJR3F6ALIDBR5SMB \
  | 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: 3f0655c22babce98ecbe02d030c7b260777422776a180aaf8bf32e39f3f0c379

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e066d42441e6d8ee6e51e6895c758806672526bceb47b637774dec7dd755a1e1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-12-02T17:17:29Z",
    "title_canon_sha256": "ef0af3faad1e6164061cec2a98fd5f7f30cdd1088865d01a785ae00ec10293c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9612020",
    "kind": "arxiv",
    "version": 1
  }
}