Pith Number

pith:CL44XRXJ

pith:2006:CL44XRXJKRE7VXALVQPIIGCASD

not attested not anchored not stored refs pending

A simple model for quasar density evolution

2), (2) Institut fuer Theoretische Astrophysik, 3) ((1) ESO, (3)Steward Observatory, AZ, Chile, Germany, Hannes Horst (1, Heidelberg, Santiago, The University of Arizona, Tucson, USA), Wolfgang J. Duschl (2

arxiv:astro-ph/0602007 v1 · 2006-02-01 · 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{CL44XRXJKRE7VXALVQPIIGCASD}

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	2026-05-18T01:40:32.560067Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

12f9cbc6e95449fadc0bac1e84184090e95ee8d65d6112c45f829f9d96e632ba

Aliases

arxiv: astro-ph/0602007 · arxiv_version: astro-ph/0602007v1 · doi: 10.48550/arxiv.astro-ph/0602007 · pith_short_12: CL44XRXJKRE7 · pith_short_16: CL44XRXJKRE7VXAL · pith_short_8: CL44XRXJ

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/CL44XRXJKRE7VXALVQPIIGCASD \
  | 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: 12f9cbc6e95449fadc0bac1e84184090e95ee8d65d6112c45f829f9d96e632ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e11ebd46fb7602cc48b35159783880b02cfe2f0962de0cc8379bebe382c0a2e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-02-01T07:29:52Z",
    "title_canon_sha256": "87c81bff8bfa5ebb755e893657ccd3e64bb471adb6eb1ebf15b9fe28b978b05d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0602007",
    "kind": "arxiv",
    "version": 1
  }
}