Pith Number

pith:QN6T7C35

pith:2017:QN6T7C35O5IVYWVHPXKLO7P2NS

not attested not anchored not stored refs pending

On the Power of Tree-Depth for Fully Polynomial FPT Algorithms

Naoto Ohsaka, Tomoaki Ogasawara, Yoichi Iwata

arxiv:1710.04376 v2 · 2017-10-12 · cs.DS · cs.CC · 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{QN6T7C35O5IVYWVHPXKLO7P2NS}

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	2026-05-18T00:32:20.054449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

837d3f8b7d77515c5aa77dd4b77dfa6cb519fa97cb6be80cd915b4897ae9433c

Aliases

arxiv: 1710.04376 · arxiv_version: 1710.04376v2 · doi: 10.48550/arxiv.1710.04376 · pith_short_12: QN6T7C35O5IV · pith_short_16: QN6T7C35O5IVYWVH · pith_short_8: QN6T7C35

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/QN6T7C35O5IVYWVHPXKLO7P2NS \
  | 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: 837d3f8b7d77515c5aa77dd4b77dfa6cb519fa97cb6be80cd915b4897ae9433c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "751ab131fe24fdf0e298194a6f7a87f3f8baa63bcc555b03a9358f6c1004b2b7",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-10-12T05:46:58Z",
    "title_canon_sha256": "bbd776f9b1c730500c996bbf7d15fa77965f8073cdf123c54b7ddf16e4227853"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.04376",
    "kind": "arxiv",
    "version": 2
  }
}