Pith Number

pith:QZ2QET5T

pith:2010:QZ2QET5TOIG3XQKUVQTL63KB6G

not attested not anchored not stored refs pending

Proof of Concept: Fast Solutions to NP-problems by Using SAT and Integer Programming Solvers

Rastislav Lenhardt

arxiv:1011.5447 v1 · 2010-11-24 · cs.DS · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QZ2QET5TOIG3XQKUVQTL63KB6G}

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	2026-05-18T04:34:47.284224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8675024fb3720dbbc154ac26bf6d41f188efb82ed83f56860523fbd812023f96

Aliases

arxiv: 1011.5447 · arxiv_version: 1011.5447v1 · doi: 10.48550/arxiv.1011.5447 · pith_short_12: QZ2QET5TOIG3 · pith_short_16: QZ2QET5TOIG3XQKU · pith_short_8: QZ2QET5T

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/QZ2QET5TOIG3XQKUVQTL63KB6G \
  | 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: 8675024fb3720dbbc154ac26bf6d41f188efb82ed83f56860523fbd812023f96

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79aec457baab1b5a29c0277c0b403d78e6e0cad823d6e701ca6e35f063d66552",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2010-11-24T18:19:29Z",
    "title_canon_sha256": "0bd0e225bd274e513b844212dedd339e7643e149b33fa4fed7647dd2236a6c6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.5447",
    "kind": "arxiv",
    "version": 1
  }
}