Pith Number

pith:L5GDHFE7

pith:2011:L5GDHFE7G53GNKYMM2PBGHWJOR

not attested not anchored not stored refs pending

Towards optimal kernel for connected vertex cover in planar graphs

Karol Suchan, Lukasz Kowalik, Marcin Pilipczuk

arxiv:1110.1964 v1 · 2011-10-10 · cs.DS · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L5GDHFE7G53GNKYMM2PBGHWJOR}

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	2026-05-18T04:11:19.226998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f4c33949f377666ab0c669e131ec9746a11ae94595c1f38e157da478aa795af

Aliases

arxiv: 1110.1964 · arxiv_version: 1110.1964v1 · doi: 10.48550/arxiv.1110.1964 · pith_short_12: L5GDHFE7G53G · pith_short_16: L5GDHFE7G53GNKYM · pith_short_8: L5GDHFE7

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/L5GDHFE7G53GNKYMM2PBGHWJOR \
  | 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: 5f4c33949f377666ab0c669e131ec9746a11ae94595c1f38e157da478aa795af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "292443902a35910ecb028f1bc496f3aff7c8651c817df70068e9eb15b746b575",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-10-10T09:06:27Z",
    "title_canon_sha256": "df8357ca9e8fedc5db6e30a93c4f035c7be1d29ff9f9eb6bf777fd47c86d8d7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.1964",
    "kind": "arxiv",
    "version": 1
  }
}