Pith Number

pith:BFK6LE6F

pith:2011:BFK6LE6FZF2P5AC6SO2QMVUPON

not attested not anchored not stored refs pending

Approximate Tree Decompositions of Planar Graphs in Linear Time

Frank Kammer, Torsten Tholey

arxiv:1104.2275 v5 · 2011-04-12 · 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{BFK6LE6FZF2P5AC6SO2QMVUPON}

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	2026-05-18T01:14:53.695927Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0955e593c5c974fe805e93b506568f737b23cc9fc751f70827074fdd54f2c18e

Aliases

arxiv: 1104.2275 · arxiv_version: 1104.2275v5 · doi: 10.48550/arxiv.1104.2275 · pith_short_12: BFK6LE6FZF2P · pith_short_16: BFK6LE6FZF2P5AC6 · pith_short_8: BFK6LE6F

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/BFK6LE6FZF2P5AC6SO2QMVUPON \
  | 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: 0955e593c5c974fe805e93b506568f737b23cc9fc751f70827074fdd54f2c18e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53d56f929a0967949596d45b5c55dc239fa18c01912b6bfd251c57d50d1fb741",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-04-12T17:12:46Z",
    "title_canon_sha256": "def6ad7884f77a6a217aa2e4aee39c77f2aaae4ea296150dd90a9104d1e0055c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2275",
    "kind": "arxiv",
    "version": 5
  }
}