Pith Number

pith:YXFHAVEA

pith:2011:YXFHAVEAGXQAWRRELEO2AMUKHN

not attested not anchored not stored refs pending

Counting Plane Graphs: Perfect Matchings, Spanning Cycles, and Kasteleyn's Technique

Adam Sheffer, Emo Welzl, Micha Sharir

arxiv:1109.5596 v1 · 2011-09-26 · 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{YXFHAVEAGXQAWRRELEO2AMUKHN}

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	2026-05-18T04:12:19.134915Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5ca70548035e00b4624591da0328a3b7d4543ec4f1a8ca403ea50f1dd6402f7

Aliases

arxiv: 1109.5596 · arxiv_version: 1109.5596v1 · doi: 10.48550/arxiv.1109.5596 · pith_short_12: YXFHAVEAGXQA · pith_short_16: YXFHAVEAGXQAWRRE · pith_short_8: YXFHAVEA

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/YXFHAVEAGXQAWRRELEO2AMUKHN \
  | 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: c5ca70548035e00b4624591da0328a3b7d4543ec4f1a8ca403ea50f1dd6402f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c464df26058bc53bf6307e6348b80f13aae72c0833a73940c99ceb6653843cb7",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2011-09-26T15:12:14Z",
    "title_canon_sha256": "18918855a9c16667ab1656af5d9e37151d44b99e3aae97ba355c9a6490209bd8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5596",
    "kind": "arxiv",
    "version": 1
  }
}