Pith Number

pith:P5WWFCYM

pith:2019:P5WWFCYMZZRZOV3HUEORGR4KZF

not attested not anchored not stored refs pending

Exploration of another Sol Lewitt puzzle from Barry Cipra

Barry Cipra, Donna Dietz, Peter Winkler

arxiv:1908.05718 v1 · 2019-08-15 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P5WWFCYMZZRZOV3HUEORGR4KZF}

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	2026-07-04T23:57:52.593674Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f6d628b0cce63975767a11d13478ac9682178b113055aef74bae4595facb5db

Aliases

arxiv: 1908.05718 · arxiv_version: 1908.05718v1 · doi: 10.48550/arxiv.1908.05718 · pith_short_12: P5WWFCYMZZRZ · pith_short_16: P5WWFCYMZZRZOV3H · pith_short_8: P5WWFCYM

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/P5WWFCYMZZRZOV3HUEORGR4KZF \
  | 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: 7f6d628b0cce63975767a11d13478ac9682178b113055aef74bae4595facb5db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64df33c64dcd865d056d48291cc0ff5457e2277aaaf861939f42b0b102de9c0d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2019-08-15T19:20:08Z",
    "title_canon_sha256": "fd796271389ca736aabc522dd86a5d2d72b60056da3497de26bdf1ed4995757f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.05718",
    "kind": "arxiv",
    "version": 1
  }
}