Pith Number

pith:K7LODARG

pith:2017:K7LODARGWRSHCCRO4OFEJB5MI7

not attested not anchored not stored refs pending

Any cyclic quadrilateral can be inscribed in any closed convex smooth curve

Arseniy Akopyan, Sergey Avvakumov

arxiv:1712.10205 v2 · 2017-12-29 · math.MG · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K7LODARGWRSHCCRO4OFEJB5MI7}

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	2026-05-18T00:14:21.981255Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

57d6e18226b464710a2ee38a4487ac47cdfbaff8546e23af7ea7220673cf92a4

Aliases

arxiv: 1712.10205 · arxiv_version: 1712.10205v2 · doi: 10.48550/arxiv.1712.10205 · pith_short_12: K7LODARGWRSH · pith_short_16: K7LODARGWRSHCCRO · pith_short_8: K7LODARG

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/K7LODARGWRSHCCRO4OFEJB5MI7 \
  | 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: 57d6e18226b464710a2ee38a4487ac47cdfbaff8546e23af7ea7220673cf92a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ac2b4e358e1b1804b039411285a62e89b8600cfcf5aa8c279834ce88fb858c2",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2017-12-29T12:32:24Z",
    "title_canon_sha256": "f9c79e45a814da1e47a00d1a3a3a79751d854b89296110c76ae08e92d003a67e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.10205",
    "kind": "arxiv",
    "version": 2
  }
}