Pith Number

pith:BO7SJ6XF

pith:2015:BO7SJ6XF7U2XOKH6DGBRYDLHUU

not attested not anchored not stored refs pending

Polynomial-time approximability of the k-Sink Location problem

Naoki Katoh, R\'emy Belmonte, Yoshio Okamoto, Yuya Higashikawa

arxiv:1503.02835 v1 · 2015-03-10 · 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{BO7SJ6XF7U2XOKH6DGBRYDLHUU}

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	2026-05-18T02:25:12.989060Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0bbf24fae5fd357728fe19831c0d67a52c7b8d3f9bd97e65f6ed3d872471218b

Aliases

arxiv: 1503.02835 · arxiv_version: 1503.02835v1 · doi: 10.48550/arxiv.1503.02835 · pith_short_12: BO7SJ6XF7U2X · pith_short_16: BO7SJ6XF7U2XOKH6 · pith_short_8: BO7SJ6XF

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/BO7SJ6XF7U2XOKH6DGBRYDLHUU \
  | 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: 0bbf24fae5fd357728fe19831c0d67a52c7b8d3f9bd97e65f6ed3d872471218b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c03e3eee8e85fbb69f3f9339ad6ab7121fa0156fd4bde8216e6e488588af4aa5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-03-10T09:52:52Z",
    "title_canon_sha256": "5d371a5a21633e947ecc6507c6fbdee218237af4417ef2bea7bd71257b71ec9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02835",
    "kind": "arxiv",
    "version": 1
  }
}