Pith Number

pith:F74MHUS7

pith:2015:F74MHUS7DUMQKYIPYLGLDH5RVI

not attested not anchored not stored refs pending

A linear-time algorithm for the geodesic center of a simple polygon

Eunjin Oh, Hee-Kap Ahn, Jean-Lou De Carufel, Luis Barba, Matias Korman, Prosenjit Bose

arxiv:1501.00561 v1 · 2015-01-03 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F74MHUS7DUMQKYIPYLGLDH5RVI}

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	2026-05-18T02:30:07.253649Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ff8c3d25f1d1905610fc2ccb19fb1aa03baf917761aa3dd2c37cf1a79b87229

Aliases

arxiv: 1501.00561 · arxiv_version: 1501.00561v1 · doi: 10.48550/arxiv.1501.00561 · pith_short_12: F74MHUS7DUMQ · pith_short_16: F74MHUS7DUMQKYIP · pith_short_8: F74MHUS7

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/F74MHUS7DUMQKYIPYLGLDH5RVI \
  | 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: 2ff8c3d25f1d1905610fc2ccb19fb1aa03baf917761aa3dd2c37cf1a79b87229

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b761a6e07a188f49543f9f0088b2bbf1b7ffd9c2e4dd6da1facfeab0060df3b0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2015-01-03T13:08:23Z",
    "title_canon_sha256": "43fca128f7e9bc70940d5568bc77586415b6afaaefbb698e127257c7799ffb60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.00561",
    "kind": "arxiv",
    "version": 1
  }
}