Pith Number

pith:DRHIXKDB

pith:1999:DRHIXKDBTOKHCNNWN7ZALONEYN

not attested not anchored not stored refs pending

Circular Separability of Polygons

Jean-Daniel Boissonnat, Jurek Czyzowicz, Mariette Yvinec, Olivier Devillers

arxiv:cs/9909007 v1 · 1999-09-03 · 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{DRHIXKDBTOKHCNNWN7ZALONEYN}

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	2026-05-18T01:06:48.782585Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c4e8ba8619b947135b66ff205b9a4c3416da9e64364bd22d9f27e481d6f591c

Aliases

arxiv: cs/9909007 · arxiv_version: cs/9909007v1 · doi: 10.48550/arxiv.cs/9909007 · pith_short_12: DRHIXKDBTOKH · pith_short_16: DRHIXKDBTOKHCNNW · pith_short_8: DRHIXKDB

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/DRHIXKDBTOKHCNNWN7ZALONEYN \
  | 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: 1c4e8ba8619b947135b66ff205b9a4c3416da9e64364bd22d9f27e481d6f591c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "378ccebbf467f2d66e9011c13962a1e88a4f00ef450adee4a0d1e16dee95da31",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.CG",
    "submitted_at": "1999-09-03T16:51:23Z",
    "title_canon_sha256": "5b70c5850461c342749f31e5123c4ed3973195681413d84612d4a486c2bb5e5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/9909007",
    "kind": "arxiv",
    "version": 1
  }
}