Pith Number

pith:IUZU62RQ

pith:2011:IUZU62RQYP7NJMBN7JMXTKRVGF

not attested not anchored not stored refs pending

The Feedback Arc Set Problem with Triangle Inequality is a Vertex Cover Problem

Monaldo Mastrolilli

arxiv:1111.4299 v2 · 2011-11-18 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IUZU62RQYP7NJMBN7JMXTKRVGF}

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	2026-05-18T02:21:28.893914Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45334f6a30c3fed4b02dfa5979aa3531579dcf5570c93b79f788eeedb833f7e5

Aliases

arxiv: 1111.4299 · arxiv_version: 1111.4299v2 · doi: 10.48550/arxiv.1111.4299 · pith_short_12: IUZU62RQYP7N · pith_short_16: IUZU62RQYP7NJMBN · pith_short_8: IUZU62RQ

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/IUZU62RQYP7NJMBN7JMXTKRVGF \
  | 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: 45334f6a30c3fed4b02dfa5979aa3531579dcf5570c93b79f788eeedb833f7e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0ef64712bbdd11d4541a4a2cf53041fb31c0eb3c389443ed9233520b8093fd8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-11-18T08:32:45Z",
    "title_canon_sha256": "cad51a17fcbc7df1e0f2f13140cb2a324cd850281f18d3c790f771b107918e5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.4299",
    "kind": "arxiv",
    "version": 2
  }
}