Pith Number

pith:7VVYWDRN

pith:2013:7VVYWDRNRBNVHVNNKKD4SDU3TQ

not attested not anchored not stored refs pending

A Faster Algorithm to Recognize Even-Hole-Free Graphs

Hsien-Chih Chang, Hsueh-I Lu

arxiv:1311.0358 v2 · 2013-11-02 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7VVYWDRNRBNVHVNNKKD4SDU3TQ}

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	2026-05-18T02:27:18.990237Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd6b8b0e2d885b53d5ad5287c90e9b9c0be37522cab27326fd7213d6b514c83d

Aliases

arxiv: 1311.0358 · arxiv_version: 1311.0358v2 · doi: 10.48550/arxiv.1311.0358 · pith_short_12: 7VVYWDRNRBNV · pith_short_16: 7VVYWDRNRBNVHVNN · pith_short_8: 7VVYWDRN

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/7VVYWDRNRBNVHVNNKKD4SDU3TQ \
  | 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: fd6b8b0e2d885b53d5ad5287c90e9b9c0be37522cab27326fd7213d6b514c83d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc0a37b359a441a5af805e02b227c14f94f1ff8e365ab37a8a3c38cc76b59d05",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-11-02T09:03:10Z",
    "title_canon_sha256": "62025b0ffd801a15875aee6bc8f8f29b6b7a9e1a4eee4004276883078a26ca79"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.0358",
    "kind": "arxiv",
    "version": 2
  }
}