Pith Number

pith:SCRBDES4

pith:2019:SCRBDES4WP7QM5SL7CIIC5GOIJ

not attested not anchored not stored refs pending

$r$-Gather Clustering and $r$-Gathering on Spider: FPT Algorithms and Hardness

Soh Kumabe, Takanori Maehara

arxiv:1907.04088 v1 · 2019-07-09 · 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{SCRBDES4WP7QM5SL7CIIC5GOIJ}

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	2026-05-17T23:41:05.718950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90a211925cb3ff06764bf8908174ce4263729dc4c4249f7e32b461330904f8a0

Aliases

arxiv: 1907.04088 · arxiv_version: 1907.04088v1 · doi: 10.48550/arxiv.1907.04088 · pith_short_12: SCRBDES4WP7Q · pith_short_16: SCRBDES4WP7QM5SL · pith_short_8: SCRBDES4

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/SCRBDES4WP7QM5SL7CIIC5GOIJ \
  | 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: 90a211925cb3ff06764bf8908174ce4263729dc4c4249f7e32b461330904f8a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74b0ce38fda54d0c9b478000992dc8da6d802c0f471520f5b3193abcf9f40f51",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-07-09T11:33:01Z",
    "title_canon_sha256": "fac0cd9ad14ac5c0e2d554fd20bf85146084d3148883dbc0f48370633eac3ae4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.04088",
    "kind": "arxiv",
    "version": 1
  }
}