Pith Number

pith:QCE3742B

pith:2015:QCE3742B5MQFPIPGZNO74B6IHW

not attested not anchored not stored refs pending

Even Orientations and Pfaffian graphs

Domenico Labbate, Federico Romaniello, John Sheehan, Mari\`en Abreu

arxiv:1510.07553 v3 · 2015-10-26 · 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{QCE3742B5MQFPIPGZNO74B6IHW}

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	2026-07-05T03:20:17.083362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8089bff341eb2057a1e6cb5dfe07c83dbf81069ac37a67ca6107160ed4b53da1

Aliases

arxiv: 1510.07553 · arxiv_version: 1510.07553v3 · doi: 10.48550/arxiv.1510.07553 · pith_short_12: QCE3742B5MQF · pith_short_16: QCE3742B5MQFPIPG · pith_short_8: QCE3742B

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/QCE3742B5MQFPIPGZNO74B6IHW \
  | 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: 8089bff341eb2057a1e6cb5dfe07c83dbf81069ac37a67ca6107160ed4b53da1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fb1dee2949be748bd9afb5f0cd12f0e66a29f79066e60e16e66121fcfff979f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-10-26T17:15:36Z",
    "title_canon_sha256": "72d3b82bbc71031810cbba2788bdbb3b0eefa0a261107e9b3c5982fc0963af59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.07553",
    "kind": "arxiv",
    "version": 3
  }
}