Pith Number

pith:PUBERRED

pith:2015:PUBERREDUO7FLVPQRDCRDP7XVM

not attested not anchored not stored refs pending

Parameterized complexity dichotomy for $(r,\ell)$-Vertex Deletion

Ignasi Sau, Julien Baste, Luerbio Faria, Sulamita Klein

arxiv:1504.05515 v2 · 2015-04-21 · 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{PUBERREDUO7FLVPQRDCRDP7XVM}

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	2026-05-18T01:02:49.999045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d0248c483a3be55d5f088c511bff7ab0218fa7ac40769f97fbac73fcb99a17f

Aliases

arxiv: 1504.05515 · arxiv_version: 1504.05515v2 · doi: 10.48550/arxiv.1504.05515 · pith_short_12: PUBERREDUO7F · pith_short_16: PUBERREDUO7FLVPQ · pith_short_8: PUBERRED

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/PUBERREDUO7FLVPQRDCRDP7XVM \
  | 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: 7d0248c483a3be55d5f088c511bff7ab0218fa7ac40769f97fbac73fcb99a17f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "372a533134c9cf86fe5c5343ca6dfa88fcf7ee0d28cc482e0bd8806f45e0f2b1",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-04-21T17:23:06Z",
    "title_canon_sha256": "2b28894d33132883a041c4235b7cb5ac4b44ea4ec65014e7bdddfb1a9fcaded2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05515",
    "kind": "arxiv",
    "version": 2
  }
}