Pith Number

pith:PCH72NMF

pith:2012:PCH72NMFMTJRPSNI5T7EMWCE2V

not attested not anchored not stored refs pending

The RegularGcc Matrix Constraint

Nina Narodytska, Ronald de Haan, Toby Walsh

arxiv:1201.0564 v1 · 2012-01-03 · cs.AI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PCH72NMFMTJRPSNI5T7EMWCE2V}

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	2026-05-18T00:56:52.990986Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

788ffd358564d317c9a8ecfe465844d555d912ad64da7b8abbddfda9fe813542

Aliases

arxiv: 1201.0564 · arxiv_version: 1201.0564v1 · doi: 10.48550/arxiv.1201.0564 · pith_short_12: PCH72NMFMTJR · pith_short_16: PCH72NMFMTJRPSNI · pith_short_8: PCH72NMF

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/PCH72NMFMTJRPSNI5T7EMWCE2V \
  | 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: 788ffd358564d317c9a8ecfe465844d555d912ad64da7b8abbddfda9fe813542

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "03b6c329e0e1a820fd1c01f733f05567a98d28a69a7cde883656ce9d367313ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2012-01-03T03:30:18Z",
    "title_canon_sha256": "91144a7caae30cef413bed74f341637dd2adeaab2e528727e2111dfaaae7a5f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0564",
    "kind": "arxiv",
    "version": 1
  }
}