Pith Number

pith:G52EA66D

pith:2021:G52EA66DT6C4EZKEYV36WL2ZMT

not attested not anchored not stored refs pending

A Modular First Formalisation of Combinatorial Design Theory

Chelsea Edmonds, Lawrence Paulson

arxiv:2105.13583 v1 · 2021-05-28 · cs.LO · math.CO · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{G52EA66DT6C4EZKEYV36WL2ZMT}

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	2026-07-05T07:30:16.871085Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3774407bc39f85c26544c577eb2f5964cbb93df581f8c4f8280285035d4461de

Aliases

arxiv: 2105.13583 · arxiv_version: 2105.13583v1 · doi: 10.48550/arxiv.2105.13583 · pith_short_12: G52EA66DT6C4 · pith_short_16: G52EA66DT6C4EZKE · pith_short_8: G52EA66D

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/G52EA66DT6C4EZKEYV36WL2ZMT \
  | 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: 3774407bc39f85c26544c577eb2f5964cbb93df581f8c4f8280285035d4461de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f74e7cd0f06982d0e888d6b4608c0e6f417bbaec0e41288534619a298f23bef",
    "cross_cats_sorted": [
      "math.CO",
      "math.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2021-05-28T04:27:56Z",
    "title_canon_sha256": "d354deace58003850d4f105152d2a00c067ced49b392eedde66f4b1e91a69bff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.13583",
    "kind": "arxiv",
    "version": 1
  }
}