Pith Number

pith:VRL72RCA

pith:2012:VRL72RCA3HSS2WMBO34ETCLQKN

not attested not anchored not stored refs pending

Recognizing Interval Bigraphs by Forbidden Patterns

Arash Rafiey

arxiv:1211.2662 v4 · 2012-11-12 · cs.DS · cs.DM · 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{VRL72RCA3HSS2WMBO34ETCLQKN}

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	2026-05-18T00:15:38.409747Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac57fd4440d9e52d598176f8498970537b7b6388ee20b7a67ab9b64c0683f723

Aliases

arxiv: 1211.2662 · arxiv_version: 1211.2662v4 · doi: 10.48550/arxiv.1211.2662 · pith_short_12: VRL72RCA3HSS · pith_short_16: VRL72RCA3HSS2WMB · pith_short_8: VRL72RCA

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/VRL72RCA3HSS2WMBO34ETCLQKN \
  | 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: ac57fd4440d9e52d598176f8498970537b7b6388ee20b7a67ab9b64c0683f723

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e22183a4d179ba3afc473c2f58ba61a1b987c53d0079c1c2eb8e9bd0b6ab71ca",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-11-12T15:38:44Z",
    "title_canon_sha256": "ff3ffc71e2ad223351bee6780ac2ed3c3d8a81334304598d426a45924547123a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2662",
    "kind": "arxiv",
    "version": 4
  }
}