Pith Number

pith:OTI2QWBH

pith:2010:OTI2QWBH3OA6RH6FRF5VY74MS6

not attested not anchored not stored refs pending

Pseudo and Strongly Pseudo 2--Factor Isomorphic Regular Graphs

D. Labbate, J. Sheehan, M. Abreu

arxiv:1002.1033 v1 · 2010-02-04 · 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{OTI2QWBH3OA6RH6FRF5VY74MS6}

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	2026-05-18T02:29:44.479293Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74d1a85827db81e89fc5897b5c7f8c9786fec0d4dac97a225e7e1253e8148a32

Aliases

arxiv: 1002.1033 · arxiv_version: 1002.1033v1 · doi: 10.48550/arxiv.1002.1033 · pith_short_12: OTI2QWBH3OA6 · pith_short_16: OTI2QWBH3OA6RH6F · pith_short_8: OTI2QWBH

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/OTI2QWBH3OA6RH6FRF5VY74MS6 \
  | 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: 74d1a85827db81e89fc5897b5c7f8c9786fec0d4dac97a225e7e1253e8148a32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65ea528bdedf0c3fecb09305f1aeeb09890e36521dc328f2197fb5e4a02d2844",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2010-02-04T16:26:48Z",
    "title_canon_sha256": "e11f878506d33839dce4cebff8660e1e8cc4d9e095196dfb1ac7607a6ede666f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.1033",
    "kind": "arxiv",
    "version": 1
  }
}