Pith Number

pith:JN3UWJUX

pith:2020:JN3UWJUXFVNGP3DCTCNXGP2IR7

not attested not anchored not stored refs pending

A survey of parameterized algorithms and the complexity of edge modification

Christophe Crespelle, Fedor V. Fomin, P{\aa}l Gr{\o}n{\aa}s Drange, Petr A. Golovach

arxiv:2001.06867 v2 · 2020-01-19 · 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{JN3UWJUXFVNGP3DCTCNXGP2IR7}

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	2026-07-05T00:41:56.573713Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b774b26972d5a67ec62989b733f488ff6747d264554abcf2c6f506b2c7748f9

Aliases

arxiv: 2001.06867 · arxiv_version: 2001.06867v2 · doi: 10.48550/arxiv.2001.06867 · pith_short_12: JN3UWJUXFVNG · pith_short_16: JN3UWJUXFVNGP3DC · pith_short_8: JN3UWJUX

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/JN3UWJUXFVNGP3DCTCNXGP2IR7 \
  | 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: 4b774b26972d5a67ec62989b733f488ff6747d264554abcf2c6f506b2c7748f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "279c9025a8e7f57f93837cd842b675ac78e668efb06395828e5aa533f0e56b31",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2020-01-19T17:20:20Z",
    "title_canon_sha256": "7e42e73e8334bec1509f0b43d3c16ced1ca17ca20837d932ac4a1c9c760978ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.06867",
    "kind": "arxiv",
    "version": 2
  }
}