Pith Number

pith:2PVVCCEL

pith:2012:2PVVCCELGY2WQBRLUR4UGXNAK3

not attested not anchored not stored refs pending

Deterministic parameterized connected vertex cover

Marek Cygan

arxiv:1202.6642 v1 · 2012-02-29 · 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{2PVVCCELGY2WQBRLUR4UGXNAK3}

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	2026-05-18T04:01:12.006738Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3eb51088b363568062ba479435da056d2f08e9c5283e5897453e3317535e664

Aliases

arxiv: 1202.6642 · arxiv_version: 1202.6642v1 · doi: 10.48550/arxiv.1202.6642 · pith_short_12: 2PVVCCELGY2W · pith_short_16: 2PVVCCELGY2WQBRL · pith_short_8: 2PVVCCEL

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/2PVVCCELGY2WQBRLUR4UGXNAK3 \
  | 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: d3eb51088b363568062ba479435da056d2f08e9c5283e5897453e3317535e664

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec3fc0afa0a25126f4917e9593aafd7ac66d4083bba2b4422e0789fa32307ac6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-02-29T18:48:21Z",
    "title_canon_sha256": "1c00435113d0d72f42333d38842c19e2259da1efebd676249097098b23cc10cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.6642",
    "kind": "arxiv",
    "version": 1
  }
}