Pith Number

pith:OKQKVKYV

pith:2013:OKQKVKYVVTCTWJSVEAM2P3BRJF

not attested not anchored not stored refs pending

On curves and polygons with the equiangular chord property

Serge Tabachnikov, Tarik Aougab, Xidian Sun, Yuwen Wang

arxiv:1311.0817 v2 · 2013-11-04 · math.DG · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OKQKVKYVVTCTWJSVEAM2P3BRJF}

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	2026-05-18T01:22:24.739966Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72a0aaab15acc53b26552019a7ec314940d3b73afba81019748aa48b65b77204

Aliases

arxiv: 1311.0817 · arxiv_version: 1311.0817v2 · doi: 10.48550/arxiv.1311.0817 · pith_short_12: OKQKVKYVVTCT · pith_short_16: OKQKVKYVVTCTWJSV · pith_short_8: OKQKVKYV

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/OKQKVKYVVTCTWJSVEAM2P3BRJF \
  | 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: 72a0aaab15acc53b26552019a7ec314940d3b73afba81019748aa48b65b77204

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "277ec9161b7030fa443da136f6f8e836ba09a9fca343a5a93d73bbbff60a3e5e",
    "cross_cats_sorted": [
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-11-04T19:16:36Z",
    "title_canon_sha256": "4d088f6aa759911cb677654fbfc2a5050274589e55e3b6aa6ca5adc3fc13fe28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.0817",
    "kind": "arxiv",
    "version": 2
  }
}