Pith Number

pith:5GYSSN7S

pith:2017:5GYSSN7SD6QVA2DTCFJFNWOPHF

not attested not anchored not stored refs pending

The Two Incenters of the Arbitrary Convex Quadrilateral

Dimitris M. Christodoulou, Nikolaos Dergiades

arxiv:1712.02207 v1 · 2017-11-29 · math.HO · 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{5GYSSN7SD6QVA2DTCFJFNWOPHF}

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	2026-05-18T00:28:38.842439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9b12937f21fa1506873115256d9cf395341283544fe7f8c62636fa74dc06461

Aliases

arxiv: 1712.02207 · arxiv_version: 1712.02207v1 · doi: 10.48550/arxiv.1712.02207 · pith_short_12: 5GYSSN7SD6QV · pith_short_16: 5GYSSN7SD6QVA2DT · pith_short_8: 5GYSSN7S

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/5GYSSN7SD6QVA2DTCFJFNWOPHF \
  | 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: e9b12937f21fa1506873115256d9cf395341283544fe7f8c62636fa74dc06461

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e49ec52152dfc463c7da2816088b7b032d69cf3a4d1088ec3013e8746ff670f8",
    "cross_cats_sorted": [
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2017-11-29T04:12:02Z",
    "title_canon_sha256": "16e2afb39e89174e2e6034970e8dac7f4d733ab848707103730113068eed7975"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.02207",
    "kind": "arxiv",
    "version": 1
  }
}