Pith Number

pith:ZPXWSIZT

pith:2018:ZPXWSIZT5VQ2IHDTK2OTK75BTF

not attested not anchored not stored refs pending

Approximating $(k,\ell)$-center clustering for curves

Anne Driemel, Irina Kostitsyna, Joachim Gudmundsson, Kevin Buchin, Maarten L\"offler, Martijn Struijs, Michael Horton

arxiv:1805.01547 v2 · 2018-05-03 · cs.CG · cs.IR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZPXWSIZT5VQ2IHDTK2OTK75BTF}

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	2026-05-18T00:10:16.816932Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cbef692333ed61a41c73569d357fa1994b2944ff5ae3b092ba9a5c8b81fc2ff4

Aliases

arxiv: 1805.01547 · arxiv_version: 1805.01547v2 · doi: 10.48550/arxiv.1805.01547 · pith_short_12: ZPXWSIZT5VQ2 · pith_short_16: ZPXWSIZT5VQ2IHDT · pith_short_8: ZPXWSIZT

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/ZPXWSIZT5VQ2IHDTK2OTK75BTF \
  | 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: cbef692333ed61a41c73569d357fa1994b2944ff5ae3b092ba9a5c8b81fc2ff4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "873f4aee2eacdcd3fe81ce7b1d27f34da454eca06cb2d196b9ba94580bea4319",
    "cross_cats_sorted": [
      "cs.IR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2018-05-03T21:32:41Z",
    "title_canon_sha256": "a4f10fdc8d646609c48765e0684ae8fcc70729e4b9541a9a2287331cdf34d3c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.01547",
    "kind": "arxiv",
    "version": 2
  }
}