Pith Number

pith:U5FUHOA7

pith:2012:U5FUHOA7OREOGCLNK6VWVQK632

not attested not anchored not stored refs pending

Tree-width for first order formulae

Isolde Adler, Mark Weyer

arxiv:1203.3814 v2 · 2012-03-16 · 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{U5FUHOA7OREOGCLNK6VWVQK632}

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	2026-05-17T23:51:24.095570Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a74b43b81f7448e3096d57ab6ac15edeac228db84273d8a956b7e357e1d6acdc

Aliases

arxiv: 1203.3814 · arxiv_version: 1203.3814v2 · doi: 10.48550/arxiv.1203.3814 · pith_short_12: U5FUHOA7OREO · pith_short_16: U5FUHOA7OREOGCLN · pith_short_8: U5FUHOA7

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/U5FUHOA7OREOGCLNK6VWVQK632 \
  | 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: a74b43b81f7448e3096d57ab6ac15edeac228db84273d8a956b7e357e1d6acdc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04f504b5b03f3bf2e2a3c3618af34e033eec0534cbfa9ca0c4283d783b4ecced",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-03-16T20:33:28Z",
    "title_canon_sha256": "b915b6d9cb706eab73d9d5a768e7cbf05a947a4db4cad7f3e1cd72b568951ee3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.3814",
    "kind": "arxiv",
    "version": 2
  }
}