Pith Number

pith:IVTWPG2F

pith:2017:IVTWPG2FLXKYZWHK3MH7SYJ3HG

not attested not anchored not stored refs pending

On Directed Feedback Vertex Set parameterized by treewidth

Arkadiusz Soca{\l}a, Jesper Nederlof, {\L}ukasz Kowalik, Marcin Wrochna, Marthe Bonamy, Micha{\l} Pilipczuk

arxiv:1707.01470 v2 · 2017-07-05 · cs.DS · 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{IVTWPG2FLXKYZWHK3MH7SYJ3HG}

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	2026-05-18T00:35:13.569856Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4567679b455dd58cd8eadb0ff9613b39810ce9d4b5ea6508a22f2b19cff7021a

Aliases

arxiv: 1707.01470 · arxiv_version: 1707.01470v2 · doi: 10.48550/arxiv.1707.01470 · pith_short_12: IVTWPG2FLXKY · pith_short_16: IVTWPG2FLXKYZWHK · pith_short_8: IVTWPG2F

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/IVTWPG2FLXKYZWHK3MH7SYJ3HG \
  | 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: 4567679b455dd58cd8eadb0ff9613b39810ce9d4b5ea6508a22f2b19cff7021a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d50ef1d2d8a9a51563e9be9101c11a19e70fab46cfd61d9fda39c7d8f733b46",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-07-05T17:07:50Z",
    "title_canon_sha256": "0d44308410acb98533a0abfa34552d3d057e9de5a0933030e8d1c96792abe41e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.01470",
    "kind": "arxiv",
    "version": 2
  }
}