Pith Number

pith:42EJLWHS

pith:2018:42EJLWHSALCSBAIKX5LEFIK6KK

not attested not anchored not stored refs pending

Too Many Hats

Michael Wiener, Piotr Zielinski, Rob Pratt, Stan Wagon

arxiv:1810.08263 v5 · 2018-10-18 · 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{42EJLWHSALCSBAIKX5LEFIK6KK}

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	2026-05-17T23:50:41.027925Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e68895d8f202c520810abf5642a15e52b6c0e1c81d9ce7e7a730241f67954dc3

Aliases

arxiv: 1810.08263 · arxiv_version: 1810.08263v5 · doi: 10.48550/arxiv.1810.08263 · pith_short_12: 42EJLWHSALCS · pith_short_16: 42EJLWHSALCSBAIK · pith_short_8: 42EJLWHS

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/42EJLWHSALCSBAIKX5LEFIK6KK \
  | 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: e68895d8f202c520810abf5642a15e52b6c0e1c81d9ce7e7a730241f67954dc3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8af422da8abbee74fdb7d010b31a89c758f34c8b8e89244882b2d9865e11459",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-10-18T20:03:15Z",
    "title_canon_sha256": "6402ea122dafc24d5d7488a9733dcb8df82cb09460b3d64a4755cc840295a0b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.08263",
    "kind": "arxiv",
    "version": 5
  }
}