Pith Number

pith:XZ3TPOQV

pith:2011:XZ3TPOQVSWR2EKOX67V2JEG5YL

not attested not anchored not stored refs pending

An Approximation Algorithm for #k-SAT

Marc Thurley

arxiv:1107.2001 v1 · 2011-07-11 · 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{XZ3TPOQVSWR2EKOX67V2JEG5YL}

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	2026-05-18T04:18:33.650847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be7737ba1595a3a229d7f7eba490ddc2ef02339c2ae8d100abd3c478bb2a9475

Aliases

arxiv: 1107.2001 · arxiv_version: 1107.2001v1 · doi: 10.48550/arxiv.1107.2001 · pith_short_12: XZ3TPOQVSWR2 · pith_short_16: XZ3TPOQVSWR2EKOX · pith_short_8: XZ3TPOQV

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/XZ3TPOQVSWR2EKOX67V2JEG5YL \
  | 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: be7737ba1595a3a229d7f7eba490ddc2ef02339c2ae8d100abd3c478bb2a9475

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b3fc164ecc8c96521ff9e8fabcd71de998a5157ff399dc52693c882f6c22efc",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-07-11T11:27:34Z",
    "title_canon_sha256": "fc07373db6d807b8c5749d56d2223f9aa948b35bf6a5f4a18afe11c1bca09e91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.2001",
    "kind": "arxiv",
    "version": 1
  }
}