Pith Number

pith:VDRQJQQO

pith:2010:VDRQJQQO6I24HR5JJPDDCGBQFB

not attested not anchored not stored refs pending

Symmetry-breaking Answer Set Solving

Christian Drescher, Oana Tifrea, Toby Walsh

arxiv:1008.1809 v1 · 2010-08-10 · 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{VDRQJQQO6I24HR5JJPDDCGBQFB}

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	2026-05-18T04:42:22.923860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8e304c20ef235c3c7a94bc63118302851ed66ee8c4347bb7904de0ab4bb937a

Aliases

arxiv: 1008.1809 · arxiv_version: 1008.1809v1 · doi: 10.48550/arxiv.1008.1809 · pith_short_12: VDRQJQQO6I24 · pith_short_16: VDRQJQQO6I24HR5J · pith_short_8: VDRQJQQO

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/VDRQJQQO6I24HR5JJPDDCGBQFB \
  | 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: a8e304c20ef235c3c7a94bc63118302851ed66ee8c4347bb7904de0ab4bb937a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cba6ff49129421f99a57f017a7834caf3470cd13b199159847549ef1cf1d9376",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2010-08-10T21:29:13Z",
    "title_canon_sha256": "7c813b67f6a0364f2850da4bc379805482fb88a62b49e4e04c3568772ee75dcc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.1809",
    "kind": "arxiv",
    "version": 1
  }
}