Pith Number

pith:OXSSJX7Z

pith:2013:OXSSJX7ZY5ZOPGYUCT445TESVF

not attested not anchored not stored refs pending

Classes of structures with no intermediate isomorphism problems

Antonio Montalb\'an

arxiv:1309.3815 v1 · 2013-09-16 · 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	2026-05-18T03:13:20.484647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75e524dff9c772e79b1414f9cecc92a95d66721ecf798db28dcd46b57343e018

Aliases

arxiv: 1309.3815 · arxiv_version: 1309.3815v1 · doi: 10.48550/arxiv.1309.3815 · pith_short_12: OXSSJX7ZY5ZO · pith_short_16: OXSSJX7ZY5ZOPGYU · pith_short_8: OXSSJX7Z

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/OXSSJX7ZY5ZOPGYUCT445TESVF \
  | 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: 75e524dff9c772e79b1414f9cecc92a95d66721ecf798db28dcd46b57343e018

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74d1ff78b2fb4552eba91bfb3606adcd7087bf86cefea88b9160cffd6e92a97e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-09-16T01:46:38Z",
    "title_canon_sha256": "c1e73f0b953aaf2a2bebc0742b8211bdcd11d52c914bf2eccfb87e1f6efce551"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.3815",
    "kind": "arxiv",
    "version": 1
  }
}