Pith Number

pith:U5I7DRWE

pith:2012:U5I7DRWEKQ3YLETUMNLCKZRUC2

not attested not anchored not stored refs pending

A Simple and Correct Even-Odd Algorithm for the Point-in-Polygon Problem for Complex Polygons

Michael Galetzka, Patrick O. Glauner

arxiv:1207.3502 v2 · 2012-07-15 · 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{U5I7DRWEKQ3YLETUMNLCKZRUC2}

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	2026-05-18T00:39:48.536718Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a751f1c6c45437859274635625663416b03541ebb72b4ac2843a89aaa44de6d3

Aliases

arxiv: 1207.3502 · arxiv_version: 1207.3502v2 · doi: 10.48550/arxiv.1207.3502 · pith_short_12: U5I7DRWEKQ3Y · pith_short_16: U5I7DRWEKQ3YLETU · pith_short_8: U5I7DRWE

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/U5I7DRWEKQ3YLETUMNLCKZRUC2 \
  | 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: a751f1c6c45437859274635625663416b03541ebb72b4ac2843a89aaa44de6d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "088dc37c073b8ca65dd068aa8248a4981f0e40e3aad7a3d5c6e73b44e0c7f8a7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2012-07-15T13:06:26Z",
    "title_canon_sha256": "295d816814cf760c9dcb7e789e3fd519d4c59896855c7105e993bfb7df17dadf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.3502",
    "kind": "arxiv",
    "version": 2
  }
}