Pith Number

pith:ZHDDDCPJ

pith:2005:ZHDDDCPJATLAXV2JI5VKZNFVBV

not attested not anchored not stored refs pending

Black Holes in Galaxy Mergers: Evolution of Quasars

(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/0504190 v2 · 2005-04-07 · 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{ZHDDDCPJATLAXV2JI5VKZNFVBV}

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

A new model of quasar mass evolution

Receipt and verification

First computed	2026-07-04T16:52:09.113098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c9c63189e904d60bd749476aacb4b50d61925a716afdca37040daf3ae0e2dbf7

Aliases

arxiv: astro-ph/0504190 · arxiv_version: astro-ph/0504190v2 · doi: 10.48550/arxiv.astro-ph/0504190 · pith_short_12: ZHDDDCPJATLA · pith_short_16: ZHDDDCPJATLAXV2J · pith_short_8: ZHDDDCPJ

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/ZHDDDCPJATLAXV2JI5VKZNFVBV \
  | 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: c9c63189e904d60bd749476aacb4b50d61925a716afdca37040daf3ae0e2dbf7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c672421e39c989b29c0f599fc18b61c7046497f13be9e7b5e6f5790c32bae91e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-04-07T20:00:53Z",
    "title_canon_sha256": "43e748d91842022cfead7dda03a5902c1367fc5c94976ebe24654b22d531d045"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0504190",
    "kind": "arxiv",
    "version": 2
  }
}