Pith Number

pith:XLYF3V6B

pith:2018:XLYF3V6BAVGABDH3HAPLEWLZTB

not attested not anchored not stored refs pending

Kasteleyn cokernels and perfect matchings on planar bipartite graphs

Libby Taylor

arxiv:1808.09927 v1 · 2018-08-29 · 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{XLYF3V6BAVGABDH3HAPLEWLZTB}

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	2026-05-18T00:06:53.957773Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

baf05dd7c1054c008cfb381eb25979984b76d83ce9716c08ca53b48c2588be0e

Aliases

arxiv: 1808.09927 · arxiv_version: 1808.09927v1 · doi: 10.48550/arxiv.1808.09927 · pith_short_12: XLYF3V6BAVGA · pith_short_16: XLYF3V6BAVGABDH3 · pith_short_8: XLYF3V6B

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/XLYF3V6BAVGABDH3HAPLEWLZTB \
  | 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: baf05dd7c1054c008cfb381eb25979984b76d83ce9716c08ca53b48c2588be0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d12755543d15c65ef9dc7c9b7fedad5969ce6e0b25d462977017d2095e9d844a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-08-29T17:05:24Z",
    "title_canon_sha256": "6d259c0a2fce9e325ff297995d2e1dfa721eb202ffc1589bc389511d047f8248"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.09927",
    "kind": "arxiv",
    "version": 1
  }
}