Pith Number

pith:6C7ZHFTP

pith:2015:6C7ZHFTPO2TPDSSOEDOEUCJJEA

not attested not anchored not stored refs pending

Parameterized Algorithms on Perfect Graphs for deletion to $(r,\ell)$-graphs

Fahad Panolan, Saket Saurabh, Sudeshna Kolay, Venkatesh Raman

arxiv:1512.04200 v1 · 2015-12-14 · 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{6C7ZHFTPO2TPDSSOEDOEUCJJEA}

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	2026-05-18T01:24:22.862051Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0bf93966f76a6f1ca4e20dc4a0929201672dbc62727e48ffa55d03f90dc333a

Aliases

arxiv: 1512.04200 · arxiv_version: 1512.04200v1 · doi: 10.48550/arxiv.1512.04200 · pith_short_12: 6C7ZHFTPO2TP · pith_short_16: 6C7ZHFTPO2TPDSSO · pith_short_8: 6C7ZHFTP

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/6C7ZHFTPO2TPDSSOEDOEUCJJEA \
  | 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: f0bf93966f76a6f1ca4e20dc4a0929201672dbc62727e48ffa55d03f90dc333a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8020649e286a3caa0d49bc202d9290f63d53b73342ba88cd399d2478eaf3252c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-12-14T07:05:04Z",
    "title_canon_sha256": "b49942cfb8ae8ed2e760153e154ceb70b26f052c8855798f4f06ccbf4bf16e40"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.04200",
    "kind": "arxiv",
    "version": 1
  }
}