Pith Number

pith:S3UUSM5T

pith:1994:S3UUSM5T72VMTNLW6UBLRPLRIG

not attested not anchored not stored refs pending

Constraints on Models of Galaxy Formation from the Evolution of Damped Ly$\alpha$ Absorption Systems

Guinevere Kauffmann, St\'ephane Charlot

arxiv:astro-ph/9402015 v1 · 1994-02-04 · 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{S3UUSM5T72VMTNLW6UBLRPLRIG}

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	2026-05-18T01:09:21.600253Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96e94933b3feaac9b576f502b8bd714184406ca6fca88bb131ceaa6efd54eaa7

Aliases

arxiv: astro-ph/9402015 · arxiv_version: astro-ph/9402015v1 · doi: 10.48550/arxiv.astro-ph/9402015 · pith_short_12: S3UUSM5T72VM · pith_short_16: S3UUSM5T72VMTNLW · pith_short_8: S3UUSM5T

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/S3UUSM5T72VMTNLW6UBLRPLRIG \
  | 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: 96e94933b3feaac9b576f502b8bd714184406ca6fca88bb131ceaa6efd54eaa7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f1c5052825e0e5b14dbd4de79f21e61358f752d28793dce8f477543c4adc81e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-02-04T18:24:20Z",
    "title_canon_sha256": "9f215c63c229d1dd2b945215a86913f75742ed27c8d0546675cdc544517cf41a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9402015",
    "kind": "arxiv",
    "version": 1
  }
}