Pith Number

pith:ZZXF2P5J

pith:2005:ZZXF2P5J6EOVCOBD2RW6SREOBN

not attested not anchored not stored refs pending

The formation history of elliptical galaxies

Darren Croton, Gabriella De Lucia, Guinevere Kauffmann, Simon D. M. White, Volker Springel

arxiv:astro-ph/0509725 v2 · 2005-09-23 · 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{ZZXF2P5J6EOVCOBD2RW6SREOBN}

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	2026-07-04T15:45:43.016459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce6e5d3fa9f11d513823d46de9448e0b4f16d98171e2fb8c7029294e6a8294bb

Aliases

arxiv: astro-ph/0509725 · arxiv_version: astro-ph/0509725v2 · doi: 10.48550/arxiv.astro-ph/0509725 · pith_short_12: ZZXF2P5J6EOV · pith_short_16: ZZXF2P5J6EOVCOBD · pith_short_8: ZZXF2P5J

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/ZZXF2P5J6EOVCOBD2RW6SREOBN \
  | 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: ce6e5d3fa9f11d513823d46de9448e0b4f16d98171e2fb8c7029294e6a8294bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea88a3b40bc5a6c887027790479da2040a4c93f1d4aa2bd32511c1220f9321c4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-23T17:12:52Z",
    "title_canon_sha256": "2d937ea33f4b665ac4dca051f44cc27f1fce99f0e288fd2a87948c6dcdf2269b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509725",
    "kind": "arxiv",
    "version": 2
  }
}