Pith Number

pith:7JYDGHTJ

pith:2015:7JYDGHTJZ4ZEFVGKA7G362YQ6U

not attested not anchored not stored refs pending

Colouring Diamond-free Graphs

Dani\"el Paulusma, Fran\c{c}ois Dross, Konrad K. Dabrowski

arxiv:1512.07849 v2 · 2015-12-24 · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7JYDGHTJZ4ZEFVGKA7G362YQ6U}

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	2026-05-18T01:06:21.029749Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa70331e69cf3242d4ca07cdbf6b10f506025b1fbef8d60a1aecd74451087dbb

Aliases

arxiv: 1512.07849 · arxiv_version: 1512.07849v2 · doi: 10.48550/arxiv.1512.07849 · pith_short_12: 7JYDGHTJZ4ZE · pith_short_16: 7JYDGHTJZ4ZEFVGK · pith_short_8: 7JYDGHTJ

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/7JYDGHTJZ4ZEFVGKA7G362YQ6U \
  | 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: fa70331e69cf3242d4ca07cdbf6b10f506025b1fbef8d60a1aecd74451087dbb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "024f166216a9f1605cee2ec8892a08a3ab6d7dfd3faa378fd6beec2b5ad2e7d4",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2015-12-24T16:23:35Z",
    "title_canon_sha256": "064682d86c7f88b0d9bf79728b389fc3f6106b2ff0c6a391fe9a23be9e43c532"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.07849",
    "kind": "arxiv",
    "version": 2
  }
}