Pith Number

pith:RA5BDSQ3

pith:1999:RA5BDSQ32VIM5BPIW3SCILVGPW

not attested not anchored not stored refs pending

The Formation of the First Stars

Richard B. Larson

arxiv:astro-ph/9912539 v1 · 1999-12-28 · 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{RA5BDSQ32VIM5BPIW3SCILVGPW}

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	2026-07-04T14:17:27.504739Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

883a11ca1bd550ce85e8b6e4242ea67d8c4d4363cb16bc7bdfdc878c61b48148

Aliases

arxiv: astro-ph/9912539 · arxiv_version: astro-ph/9912539v1 · doi: 10.48550/arxiv.astro-ph/9912539 · pith_short_12: RA5BDSQ32VIM · pith_short_16: RA5BDSQ32VIM5BPI · pith_short_8: RA5BDSQ3

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/RA5BDSQ32VIM5BPIW3SCILVGPW \
  | 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: 883a11ca1bd550ce85e8b6e4242ea67d8c4d4363cb16bc7bdfdc878c61b48148

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ffee2cec951011d19091a5341d3c80d3262994bf9ba95128845ad9399c71359",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-28T21:23:19Z",
    "title_canon_sha256": "c8e3693f76f827e9e003b2f8211858c1480a1c5eea977332b11ea49137baad23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912539",
    "kind": "arxiv",
    "version": 1
  }
}