Pith Number

pith:OR4CIM4S

pith:2022:OR4CIM4SDXK5LHRCOWMETEJSVX

not attested not anchored not stored refs pending

Formalising Fisher's Inequality: Formal Linear Algebraic Proof Techniques in Combinatorics

Chelsea Edmonds, Lawrence C. Paulson

arxiv:2207.02728 v1 · 2022-07-06 · cs.LO · 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{OR4CIM4SDXK5LHRCOWMETEJSVX}

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	2026-07-05T07:30:17.710742Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74782433921dd5d59e227598499132adefbe10b28edf744ffdc8400ba12a33ff

Aliases

arxiv: 2207.02728 · arxiv_version: 2207.02728v1 · doi: 10.48550/arxiv.2207.02728 · pith_short_12: OR4CIM4SDXK5 · pith_short_16: OR4CIM4SDXK5LHRC · pith_short_8: OR4CIM4S

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/OR4CIM4SDXK5LHRCOWMETEJSVX \
  | 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: 74782433921dd5d59e227598499132adefbe10b28edf744ffdc8400ba12a33ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad83e53b15a761cae70c96cabc7a0b7fd0a51976b3b5da5fbef0f0539bc2070c",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2022-07-06T14:55:11Z",
    "title_canon_sha256": "5b02fd69249d016bada70b076a5805d6e4d2547e3497db1bf1c9ce8039883355"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2207.02728",
    "kind": "arxiv",
    "version": 1
  }
}