Pith Number

pith:FPPG75DJ

pith:2011:FPPG75DJMPRBLRKVRUYVOMP4WY

not attested not anchored not stored refs pending

Nearly Optimal NP-Hardness of Vertex Cover on k-Uniform k-Partite Hypergraphs

Rishi Saket, Sushant Sachdeva

arxiv:1105.4175 v1 · 2011-05-20 · cs.CC · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FPPG75DJMPRBLRKVRUYVOMP4WY}

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	2026-05-18T04:21:29.631600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bde6ff46963e215c5558d315731fcb60f1385d1c1b754701bb99b0232dac6b0

Aliases

arxiv: 1105.4175 · arxiv_version: 1105.4175v1 · doi: 10.48550/arxiv.1105.4175 · pith_short_12: FPPG75DJMPRB · pith_short_16: FPPG75DJMPRBLRKV · pith_short_8: FPPG75DJ

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/FPPG75DJMPRBLRKVRUYVOMP4WY \
  | 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: 2bde6ff46963e215c5558d315731fcb60f1385d1c1b754701bb99b0232dac6b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f7bde33cbaf2ef2e58d570a2f7829c89bfb018da9a62dfc69f4640c21fe61da",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-05-20T20:57:51Z",
    "title_canon_sha256": "acef458a99af8419c0f992036324927290dfe9b23ca43fad1128da6b26f3b051"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4175",
    "kind": "arxiv",
    "version": 1
  }
}