Pith Number

pith:42LPAOY7

pith:2002:42LPAOY7QVDCD27ADHXNDHWASX

not attested not anchored not stored refs pending

A Primal-Dual Parallel Approximation Technique Applied to Weighted Set and Vertex Cover

Neal Young, Samir Khuller, Uzi Vishkin

arxiv:cs/0205037 v1 · 2002-05-18 · cs.DS · cs.DC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42LPAOY7QVDCD27ADHXNDHWASX}

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	2026-05-18T01:59:53.964774Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e696f03b1f854621ebe019eed19ec095e0598f4a1d9bfdc29eb9921ddb74b30e

Aliases

arxiv: cs/0205037 · arxiv_version: cs/0205037v1 · doi: 10.48550/arxiv.cs/0205037 · pith_short_12: 42LPAOY7QVDC · pith_short_16: 42LPAOY7QVDCD27A · pith_short_8: 42LPAOY7

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/42LPAOY7QVDCD27ADHXNDHWASX \
  | 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: e696f03b1f854621ebe019eed19ec095e0598f4a1d9bfdc29eb9921ddb74b30e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "adb3cb52b99b1b473554c926660ffcf06216f1ea9ce5ea1d4ae40f6f67ae6a4e",
    "cross_cats_sorted": [
      "cs.DC"
    ],
    "license": "",
    "primary_cat": "cs.DS",
    "submitted_at": "2002-05-18T04:22:29Z",
    "title_canon_sha256": "5a12bf09d2c4538c1af178800b3b0643afd8f02e8793f124d52e20e9a6d2adeb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0205037",
    "kind": "arxiv",
    "version": 1
  }
}