Pith Number

pith:Y3BYFQAW

pith:2019:Y3BYFQAWRTPXR4XGGVY7BYICIN

not attested not anchored not stored refs pending

Counting perfect matchings and the eight-vertex model

Jin-Yi Cai, Tianyu Liu

arxiv:1904.10493 v1 · 2019-04-23 · cs.CC · cs.DM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y3BYFQAWRTPXR4XGGVY7BYICIN}

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	2026-05-17T23:47:53.561518Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6c382c0168cdf78f2e63571f0e102437dc939f6c18ba2d5b8597d866ec25b81

Aliases

arxiv: 1904.10493 · arxiv_version: 1904.10493v1 · doi: 10.48550/arxiv.1904.10493 · pith_short_12: Y3BYFQAWRTPX · pith_short_16: Y3BYFQAWRTPXR4XG · pith_short_8: Y3BYFQAW

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/Y3BYFQAWRTPXR4XGGVY7BYICIN \
  | 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: c6c382c0168cdf78f2e63571f0e102437dc939f6c18ba2d5b8597d866ec25b81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e3779172131de34beb43dcb825ef332e6f1faed650349f0ca860c08abbb5c7f",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-04-23T18:52:15Z",
    "title_canon_sha256": "26ed2801a44ea1aa9bd71b6593cb2a29865c850f8f95b8422780ae95354c3b99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.10493",
    "kind": "arxiv",
    "version": 1
  }
}