Pith Number

pith:ORZDG5RD

pith:2026:ORZDG5RDDPKHQWIDEMJQ2DD5DO

not attested not anchored not stored refs pending

Planar Perfect Matching Counting is as Hard as Determinants

Jiaheng Wang, Radu Curticapean

arxiv:2606.03975 v1 · 2026-06-02 · cs.CC · cs.DM · 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{ORZDG5RDDPKHQWIDEMJQ2DD5DO}

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	2026-06-03T02:06:08.402170Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74723376231bd478590323130d0c7d1b9c0f5cf609c05647fd6f5286d69bfc0c

Aliases

arxiv: 2606.03975 · arxiv_version: 2606.03975v1 · doi: 10.48550/arxiv.2606.03975 · pith_short_12: ORZDG5RDDPKH · pith_short_16: ORZDG5RDDPKHQWID · pith_short_8: ORZDG5RD

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/ORZDG5RDDPKHQWIDEMJQ2DD5DO \
  | 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: 74723376231bd478590323130d0c7d1b9c0f5cf609c05647fd6f5286d69bfc0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7551f441a287f33a217356ca6f62b2059782f88a8142339809f951f67e082f79",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2026-06-02T17:56:22Z",
    "title_canon_sha256": "160d89811334449bbc33faad3ae812a2142f5877df1e08ecc4b5305f020a8ada"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.03975",
    "kind": "arxiv",
    "version": 1
  }
}