Pith Number

pith:FCJOKEV6

pith:2009:FCJOKEV6JA2WDNQD426H4UPG7F

not attested not anchored not stored refs pending

A Linear-Time Algorithm for the Maximum Matched-Paired-Domination Problem in Cographs

Chih-Chia Yao, Ruo-Wei Hung

arxiv:0902.1121 v1 · 2009-02-06 · 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{FCJOKEV6JA2WDNQD426H4UPG7F}

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	2026-05-18T01:59:59.399146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2892e512be483561b603e6bc7e51e6f97a234c054fc3fe7f8ccded114af4d38d

Aliases

arxiv: 0902.1121 · arxiv_version: 0902.1121v1 · doi: 10.48550/arxiv.0902.1121 · pith_short_12: FCJOKEV6JA2W · pith_short_16: FCJOKEV6JA2WDNQD · pith_short_8: FCJOKEV6

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/FCJOKEV6JA2WDNQD426H4UPG7F \
  | 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: 2892e512be483561b603e6bc7e51e6f97a234c054fc3fe7f8ccded114af4d38d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ae0dec702552f0734ba1f23dda8ea6c0fd3ae9a57c1d9f71e3e0489a3b06347",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-02-06T19:10:29Z",
    "title_canon_sha256": "860748417b3473f2f91b91d255d82d93100549fa1573094c521814a446d05634"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.1121",
    "kind": "arxiv",
    "version": 1
  }
}