Pith Number

pith:JPFSP3AX

pith:2005:JPFSP3AXYCJGN4CDTJIZ6ANNC6

not attested not anchored not stored refs pending

A Physical Model for the Origin of Quasar Lifetimes

(2) MPA), Brant Robertson (1), Lars Hernquist (1), Paul Martini (1), Philip F. Hopkins (1), Thomas J. Cox (1), Tiziana Di Matteo (2), Volker Springel (2) ((1) Harvard U.

arxiv:astro-ph/0502241 v1 · 2005-02-11 · 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{JPFSP3AXYCJGN4CDTJIZ6ANNC6}

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.

Cited by

1 paper in Pith

Clustering of high-redshift quasars with DESI DR2

Receipt and verification

First computed	2026-07-04T16:50:48.617001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4bcb27ec17c09266f0439a519f01ad17890e582512bfb9904667eaf4633f953b

Aliases

arxiv: astro-ph/0502241 · arxiv_version: astro-ph/0502241v1 · doi: 10.48550/arxiv.astro-ph/0502241 · pith_short_12: JPFSP3AXYCJG · pith_short_16: JPFSP3AXYCJGN4CD · pith_short_8: JPFSP3AX

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/JPFSP3AXYCJGN4CDTJIZ6ANNC6 \
  | 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: 4bcb27ec17c09266f0439a519f01ad17890e582512bfb9904667eaf4633f953b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30e9ac6363b62430508908fe84fa5f18e83875d647ffb2256a5b730adea09d67",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-02-11T21:12:53Z",
    "title_canon_sha256": "757a0a6040b58346737e9dda7b265e6b3b4108f7f6f61dff7df965d448caaf5c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0502241",
    "kind": "arxiv",
    "version": 1
  }
}