Pith Number

pith:ZQX3K5CJ

pith:2021:ZQX3K5CJWJOZUE2OUVXDN5SMCE

not attested not anchored not stored refs pending

The Eclectic Content and Sources of Christopher Clavius's Geometria Practica

John B. Little

arxiv:2112.03331 v2 · 2021-12-06 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZQX3K5CJWJOZUE2OUVXDN5SMCE}

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	2026-07-05T03:41:04.948471Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc2fb57449b25d9a134ea56e36f64c1112930f1e71ebb8b8358eecf8295b23db

Aliases

arxiv: 2112.03331 · arxiv_version: 2112.03331v2 · doi: 10.48550/arxiv.2112.03331 · pith_short_12: ZQX3K5CJWJOZ · pith_short_16: ZQX3K5CJWJOZUE2O · pith_short_8: ZQX3K5CJ

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/ZQX3K5CJWJOZUE2OUVXDN5SMCE \
  | 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: cc2fb57449b25d9a134ea56e36f64c1112930f1e71ebb8b8358eecf8295b23db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e9750235d91ef957b8bdca68d94ade0e2fd2b43dd4af90fb2752cf5ffc8cfc1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2021-12-06T19:50:28Z",
    "title_canon_sha256": "c667579f4433c0d9f60096387d0659ea82ae6ff6fab3aa96085a5ca81ead676f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.03331",
    "kind": "arxiv",
    "version": 2
  }
}