Pith Number

pith:I67IRNBQ

pith:2000:I67IRNBQHUYI5DWFPFOBKS5SFE

not attested not anchored not stored refs pending

CFHT Optical PDCS Survey II: Evolution in the Space Density of Clusters of Galaxies

A. K. Romer, A. Mazure, B. P. Holden, C. Adami, F. J. Castander, L. M. Lubin, M. Postman, M. P. Ulmer, R. C. Nichol

arxiv:astro-ph/0004091 v1 · 2000-04-06 · 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{I67IRNBQHUYI5DWFPFOBKS5SFE}

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	2026-07-04T16:16:16.145423Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

47be88b4303d308e8ec5795c154bb2290c2784df42463ed2b20463d20a1e86db

Aliases

arxiv: astro-ph/0004091 · arxiv_version: astro-ph/0004091v1 · doi: 10.48550/arxiv.astro-ph/0004091 · pith_short_12: I67IRNBQHUYI · pith_short_16: I67IRNBQHUYI5DWF · pith_short_8: I67IRNBQ

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/I67IRNBQHUYI5DWFPFOBKS5SFE \
  | 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: 47be88b4303d308e8ec5795c154bb2290c2784df42463ed2b20463d20a1e86db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e7e45a5fa303ef6ba11ffa664b25427ccdb38d10666bb380a3ceb3e688f7c8b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-04-06T19:07:20Z",
    "title_canon_sha256": "5e1e4adc51c83d0a81c80ea7d8bb1b8b18885e933927325c9083da97f61dc0bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0004091",
    "kind": "arxiv",
    "version": 1
  }
}