Pith Number

pith:4AYZ4KSF

pith:2005:4AYZ4KSFPMIISDWXRHN6HVN56P

not attested not anchored not stored refs pending

Formation and Evolution of Supermassive Black Holes

Francoise Combes (LERMA, Observatoire de Paris)

arxiv:astro-ph/0505463 v1 · 2005-05-22 · 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{4AYZ4KSFPMIISDWXRHN6HVN56P}

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	2026-05-18T01:40:34.045347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0319e2a457b10890ed789dbe3d5bdf3ff8b88590ccfcaeac99e766488ec4317

Aliases

arxiv: astro-ph/0505463 · arxiv_version: astro-ph/0505463v1 · doi: 10.48550/arxiv.astro-ph/0505463 · pith_short_12: 4AYZ4KSFPMII · pith_short_16: 4AYZ4KSFPMIISDWX · pith_short_8: 4AYZ4KSF

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/4AYZ4KSFPMIISDWXRHN6HVN56P \
  | 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: e0319e2a457b10890ed789dbe3d5bdf3ff8b88590ccfcaeac99e766488ec4317

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b09ff2c164c734c8938ed61101774d6afaef2840f75c684889a3537c9b2006ee",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-05-22T17:16:38Z",
    "title_canon_sha256": "2775ef901223c3715030550d7e9ca1610683fd273a37023a89145136bda30a44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0505463",
    "kind": "arxiv",
    "version": 1
  }
}