Pith Number

pith:7XULCS4V

pith:2009:7XULCS4VM5E76K6BYPBALNEZJ7

not attested not anchored not stored refs pending

Nominal Abstraction

Andrew Gacek, Dale Miller, Gopalan Nadathur

arxiv:0908.1390 v3 · 2009-08-10 · cs.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{7XULCS4VM5E76K6BYPBALNEZJ7}

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	2026-05-18T04:40:32.860033Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fde8b14b956749ff2bc1c3c205b4994fcad072baa60de977ed8e2467046d4be8

Aliases

arxiv: 0908.1390 · arxiv_version: 0908.1390v3 · doi: 10.48550/arxiv.0908.1390 · pith_short_12: 7XULCS4VM5E7 · pith_short_16: 7XULCS4VM5E76K6B · pith_short_8: 7XULCS4V

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/7XULCS4VM5E76K6BYPBALNEZJ7 \
  | 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: fde8b14b956749ff2bc1c3c205b4994fcad072baa60de977ed8e2467046d4be8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e6c114169f995f23d789bdaa67591e7fe3c4e48e64526823cc8682a99b98248",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2009-08-10T20:36:43Z",
    "title_canon_sha256": "a66ded0fb549ef910d30c51d88de55028b301754063365fa93676b83cb6964a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.1390",
    "kind": "arxiv",
    "version": 3
  }
}