Pith Number

pith:4SYPFZDR

pith:2015:4SYPFZDRLJW7VYIHMEL6LECIRC

not attested not anchored not stored refs pending

A faster FPT Algorithm and a smaller Kernel for Block Graph Vertex Deletion

Akanksha Agrawal, Daniel Lokshtanov, Saket Saurabh, Sudeshna Kolay

arxiv:1510.08154 v1 · 2015-10-28 · cs.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4SYPFZDRLJW7VYIHMEL6LECIRC}

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	2026-05-18T01:28:37.165013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4b0f2e4715a6dfae1076117e5904888a86a8f76e32c556724e0b1acc2c834f3

Aliases

arxiv: 1510.08154 · arxiv_version: 1510.08154v1 · doi: 10.48550/arxiv.1510.08154 · pith_short_12: 4SYPFZDRLJW7 · pith_short_16: 4SYPFZDRLJW7VYIH · pith_short_8: 4SYPFZDR

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/4SYPFZDRLJW7VYIHMEL6LECIRC \
  | 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: e4b0f2e4715a6dfae1076117e5904888a86a8f76e32c556724e0b1acc2c834f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "23f460330f451448dbe5e6f8fa4019faa44ec5a1a6681f3f33014ce75c52ae41",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-10-28T01:37:26Z",
    "title_canon_sha256": "33bfc00b8d42c8719a713d553018f98ed81c9e041527e38f93c806c8a14e6298"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.08154",
    "kind": "arxiv",
    "version": 1
  }
}