Pith Number

pith:N64VKRZ3

pith:2011:N64VKRZ3PCXIRV6INOIEJ2DJ7J

not attested not anchored not stored refs pending

Fixed Parameter Tractable Algorithm for Firefighting Problem

Ming Lam Leung

arxiv:1104.1044 v2 · 2011-04-06 · 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{N64VKRZ3PCXIRV6INOIEJ2DJ7J}

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	2026-05-18T02:22:10.822096Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6fb955473b78ae88d7c86b9044e869fa4dd761cb5ce5d7df4dea7453b213e37d

Aliases

arxiv: 1104.1044 · arxiv_version: 1104.1044v2 · doi: 10.48550/arxiv.1104.1044 · pith_short_12: N64VKRZ3PCXI · pith_short_16: N64VKRZ3PCXIRV6I · pith_short_8: N64VKRZ3

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/N64VKRZ3PCXIRV6INOIEJ2DJ7J \
  | 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: 6fb955473b78ae88d7c86b9044e869fa4dd761cb5ce5d7df4dea7453b213e37d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3a0688abbb5328de0ae1270d9d6401753b4e74eb98459d21f52191a4b7fa4f7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-04-06T09:33:42Z",
    "title_canon_sha256": "4105074fcd6a0df93221b8d5856c72e6d8de42b9b8d609b1b0d3ba51eac7617a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1044",
    "kind": "arxiv",
    "version": 2
  }
}