Pith Number

pith:IYLBI6AZ

pith:2014:IYLBI6AZK63IPRKB4ZK5KUQZCB

not attested not anchored not stored refs pending

Mixing Homomorphisms, Recolourings, and Extending Circular Precolourings

Jonathan A. Noel, Richard C. Brewster

arxiv:1412.3493 v1 · 2014-12-10 · math.CO · cs.DM

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

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	2026-05-18T02:31:36.438693Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

461614781957b687c541e655d5521910677006c85c44b6eeb6d939a4c8737291

Aliases

arxiv: 1412.3493 · arxiv_version: 1412.3493v1 · doi: 10.48550/arxiv.1412.3493 · pith_short_12: IYLBI6AZK63I · pith_short_16: IYLBI6AZK63IPRKB · pith_short_8: IYLBI6AZ

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/IYLBI6AZK63IPRKB4ZK5KUQZCB \
  | 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: 461614781957b687c541e655d5521910677006c85c44b6eeb6d939a4c8737291

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e49dd2e03401fb70ee4176ff7b4eb2a8e004b79ddbd020b1442d05b02a415ef",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-12-10T23:14:12Z",
    "title_canon_sha256": "b621218f8c06b3be7aa1e5b2438574db7ec9763b8198da6506d7be4c9036063a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.3493",
    "kind": "arxiv",
    "version": 1
  }
}