Pith Number

pith:37TCZU3A

pith:2014:37TCZU3AH2GTINSSFNL7MHZWXT

not attested not anchored not stored refs pending

Trees, ladders and graphs

D\'aniel T. Soukup

arxiv:1409.2922 v1 · 2014-09-09 · math.CO · math.LO

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	2026-05-18T02:43:08.732734Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dfe62cd3603e8d3436522b57f61f36bcd7ea6a54961bff4e52e7a9c7708c10ca

Aliases

arxiv: 1409.2922 · arxiv_version: 1409.2922v1 · doi: 10.48550/arxiv.1409.2922 · pith_short_12: 37TCZU3AH2GT · pith_short_16: 37TCZU3AH2GTINSS · pith_short_8: 37TCZU3A

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/37TCZU3AH2GTINSSFNL7MHZWXT \
  | 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: dfe62cd3603e8d3436522b57f61f36bcd7ea6a54961bff4e52e7a9c7708c10ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fc6909a7fea933db2e814678bbdc97de639433713e37f3a3402fb7e48084587",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-09-09T23:50:55Z",
    "title_canon_sha256": "84e16efb33575bf7febb13e88a543d31c5c1e2d0f061b5b5151815b78fe0d05f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.2922",
    "kind": "arxiv",
    "version": 1
  }
}