Pith Number

pith:WCFOIEPH

pith:2014:WCFOIEPH6QK3LEHQQOKYS4N6MY

not attested not anchored not stored refs pending

A Faster Parameterized Algorithm for Treedepth

Felix Reidl, Fernando Sanchez Villaamil, Peter Rossmanith, Somnath Sikdar

arxiv:1401.7540 v4 · 2014-01-29 · 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{WCFOIEPH6QK3LEHQQOKYS4N6MY}

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	2026-05-18T02:44:49.722976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b08ae411e7f415b590f083958971be66236cb52d2af2ffbd7cd2d51059767051

Aliases

arxiv: 1401.7540 · arxiv_version: 1401.7540v4 · doi: 10.48550/arxiv.1401.7540 · pith_short_12: WCFOIEPH6QK3 · pith_short_16: WCFOIEPH6QK3LEHQ · pith_short_8: WCFOIEPH

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/WCFOIEPH6QK3LEHQQOKYS4N6MY \
  | 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: b08ae411e7f415b590f083958971be66236cb52d2af2ffbd7cd2d51059767051

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1775d4df881e984d96e9449ebea3725e9cdc152e6a21dabc7d2d702e0868355",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2014-01-29T15:26:04Z",
    "title_canon_sha256": "7cb58abf43a4ef650207a4aa0bb8f7d36215477b7704c218a6170bc1a96b3d80"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.7540",
    "kind": "arxiv",
    "version": 4
  }
}