Pith Number

pith:JQDOQAFE

pith:2015:JQDOQAFEWAJWUOIPJCY4SOQDAJ

not attested not anchored not stored refs pending

The number of non-crossing perfect plane matchings is minimized (almost) only by point sets in convex position

Andrei Asinowski

arxiv:1502.05332 v1 · 2015-02-18 · 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{JQDOQAFEWAJWUOIPJCY4SOQDAJ}

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	2026-05-18T02:26:51.968448Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c06e800a4b0136a390f48b1c93a03025dc99a80e9c04e2ace67b01a43bde3a8

Aliases

arxiv: 1502.05332 · arxiv_version: 1502.05332v1 · doi: 10.48550/arxiv.1502.05332 · pith_short_12: JQDOQAFEWAJW · pith_short_16: JQDOQAFEWAJWUOIP · pith_short_8: JQDOQAFE

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/JQDOQAFEWAJWUOIPJCY4SOQDAJ \
  | 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: 4c06e800a4b0136a390f48b1c93a03025dc99a80e9c04e2ace67b01a43bde3a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0bd8d79a8448c25939b1c822372b33229bbba33efa06bb521fb4f5f2da12a56",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2015-02-18T18:33:18Z",
    "title_canon_sha256": "96adc721a88da4e7af5fa550c141b1f3d7113ea6fd90497e4d3255024a4d3334"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.05332",
    "kind": "arxiv",
    "version": 1
  }
}