Pith Number

pith:MJL3IUOZ

pith:2001:MJL3IUOZBKJ5S7OHZEZP4SWJCC

not attested not anchored not stored refs pending

Recognizing When Heuristics Can Approximate Minimum Vertex Covers Is Complete for Parallel Access to NP

Edith Hemaspaandra, Holger Spakowski, J\"org Rothe

arxiv:cs/0110025 v2 · 2001-10-10 · 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{MJL3IUOZBKJ5S7OHZEZP4SWJCC}

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	2026-05-18T01:09:08.424527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6257b451d90a93d97dc7c932fe4ac910861c836b115c9e1f97753d1ceacd7732

Aliases

arxiv: cs/0110025 · arxiv_version: cs/0110025v2 · doi: 10.48550/arxiv.cs/0110025 · pith_short_12: MJL3IUOZBKJ5 · pith_short_16: MJL3IUOZBKJ5S7OH · pith_short_8: MJL3IUOZ

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/MJL3IUOZBKJ5S7OHZEZP4SWJCC \
  | 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: 6257b451d90a93d97dc7c932fe4ac910861c836b115c9e1f97753d1ceacd7732

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1edb022821f4f9d308819e2d16707802aa85a416e945b3a7ee70d8ed83708d81",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.CC",
    "submitted_at": "2001-10-10T15:02:35Z",
    "title_canon_sha256": "89896e61a4d2624a04d44e750c790326f49f70d4c9f32cec8c77b24ab52d4624"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0110025",
    "kind": "arxiv",
    "version": 2
  }
}