Pith Number

pith:4T7IAAZW

pith:2005:4T7IAAZWGPZRDT4VBWOUEB7K3R

not attested not anchored not stored refs pending

The Evolution in the Faint-End Slope of the Quasar Luminosity Function

(2) Carnegie-Mellon, (3) MPA Garching), Brant Robertson (1), Lars Hernquist (1), Philip F. Hopkins (1), Thomas J. Cox (1), Tiziana Di Matteo (2), Volker Springel (3) ((1) Harvard-Smithsonian Center for Astrophysics

arxiv:astro-ph/0508299 v2 · 2005-08-12 · 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{4T7IAAZWGPZRDT4VBWOUEB7K3R}

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	2026-07-04T15:46:55.948348Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4fe80033633f311cf950d9d4207eadc5dc4ea287dff5388048ddc26d8d12b54

Aliases

arxiv: astro-ph/0508299 · arxiv_version: astro-ph/0508299v2 · doi: 10.48550/arxiv.astro-ph/0508299 · pith_short_12: 4T7IAAZWGPZR · pith_short_16: 4T7IAAZWGPZRDT4V · pith_short_8: 4T7IAAZW

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/4T7IAAZWGPZRDT4VBWOUEB7K3R \
  | 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: e4fe80033633f311cf950d9d4207eadc5dc4ea287dff5388048ddc26d8d12b54

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc615485e7062e705ea7980af3ddfb42f27a368aee8a820777fc600b1413aa19",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-08-12T21:04:46Z",
    "title_canon_sha256": "53be098ed454f5c591f84ec9d6cb859d136d19afc52afc243a871afd66c0748f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0508299",
    "kind": "arxiv",
    "version": 2
  }
}