Pith Number

pith:F3K2CXQI

pith:2005:F3K2CXQIXBATKY7HGTNKHODVTS

not attested not anchored not stored refs pending

Energy and length in a topological planar quadrilateral

Sa'ar Hersonsky

arxiv:math/0511289 v2 · 2005-11-11 · math.MG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F3K2CXQIXBATKY7HGTNKHODVTS}

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	2026-05-18T03:48:25.202186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ed5a15e08b8413563e734daa3b8759c89cedd3e95f4ae1c81eea70e70ba86c5

Aliases

arxiv: math/0511289 · arxiv_version: math/0511289v2 · doi: 10.48550/arxiv.math/0511289 · pith_short_12: F3K2CXQIXBAT · pith_short_16: F3K2CXQIXBATKY7H · pith_short_8: F3K2CXQI

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/F3K2CXQIXBATKY7HGTNKHODVTS \
  | 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: 2ed5a15e08b8413563e734daa3b8759c89cedd3e95f4ae1c81eea70e70ba86c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db56aeb6335d564f9d0a9cced2ec6ba82277f012b0bcdf86bc57d656b2c09644",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "",
    "primary_cat": "math.MG",
    "submitted_at": "2005-11-11T04:51:51Z",
    "title_canon_sha256": "1e8bc2ec4f082bfb5c46cf2f3f332c7960d92729f2d94062f1d6f11efbc6168b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0511289",
    "kind": "arxiv",
    "version": 2
  }
}