Pith Number

pith:CVYV5BSP

pith:2012:CVYV5BSP6SPSBN6BELIL4RXDLN

not attested not anchored not stored refs pending

Extracting squares from any quadrilateral

Pierre Godard

arxiv:1203.4167 v1 · 2012-03-12 · math.GM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CVYV5BSP6SPSBN6BELIL4RXDLN}

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	2026-05-18T03:59:48.165552Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

15715e864ff49f20b7c122d0be46e35b73782717013cff4ebbec01d59b8bbd19

Aliases

arxiv: 1203.4167 · arxiv_version: 1203.4167v1 · doi: 10.48550/arxiv.1203.4167 · pith_short_12: CVYV5BSP6SPS · pith_short_16: CVYV5BSP6SPSBN6B · pith_short_8: CVYV5BSP

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/CVYV5BSP6SPSBN6BELIL4RXDLN \
  | 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: 15715e864ff49f20b7c122d0be46e35b73782717013cff4ebbec01d59b8bbd19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "463c5d06e14f709250c3003d1ba2a36ed0258b5f516f2c1610b7ebd20374f621",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GM",
    "submitted_at": "2012-03-12T22:14:00Z",
    "title_canon_sha256": "c305307be189314faedf31c959dc30d4cfb8682efbf62b5a0f328691a943e86c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.4167",
    "kind": "arxiv",
    "version": 1
  }
}