Pith Number

pith:2S5UIQL7

pith:2009:2S5UIQL7D7D4FDDHAVUUC5OH3X

not attested not anchored not stored refs pending

Forbidden substrings on weighted alphabets

Amy N. Myers

arxiv:0906.3763 v1 · 2009-06-20 · 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{2S5UIQL7D7D4FDDHAVUUC5OH3X}

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	2026-07-04T15:44:05.248966Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4bb44417f1fc7c28c6705694175c7dddfb370211fd5d0f8f89f19b2012fad7e

Aliases

arxiv: 0906.3763 · arxiv_version: 0906.3763v1 · doi: 10.48550/arxiv.0906.3763 · pith_short_12: 2S5UIQL7D7D4 · pith_short_16: 2S5UIQL7D7D4FDDH · pith_short_8: 2S5UIQL7

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/2S5UIQL7D7D4FDDHAVUUC5OH3X \
  | 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: d4bb44417f1fc7c28c6705694175c7dddfb370211fd5d0f8f89f19b2012fad7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1f091f6a0a534747dc91f35ebca31237c86a981b09a964089ca8f66bd57c7c5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-06-20T01:03:40Z",
    "title_canon_sha256": "a2ad32dd1b91bfef6d652d7652a9f7390308078a3a4e7ced81b947ed5d76f963"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.3763",
    "kind": "arxiv",
    "version": 1
  }
}