Pith Number

pith:H2RJ2XYR

pith:2018:H2RJ2XYRBMTXTIFXUEJ2EGN4RB

not attested not anchored not stored refs pending

Reverse engineering of CAD models via clustering and approximate implicitization

Andrea Raffo, Georg Muntingh, Oliver J.D. Barrowclough

arxiv:1810.07451 v3 · 2018-10-17 · math.NA · cs.GR · cs.LG · cs.NA · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H2RJ2XYRBMTXTIFXUEJ2EGN4RB}

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	2026-07-05T06:39:27.995209Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ea29d5f110b2779a0b7a113a219bc886e1f5e61809580ee551bf2008b80ef8a

Aliases

arxiv: 1810.07451 · arxiv_version: 1810.07451v3 · doi: 10.48550/arxiv.1810.07451 · pith_short_12: H2RJ2XYRBMTX · pith_short_16: H2RJ2XYRBMTXTIFX · pith_short_8: H2RJ2XYR

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/H2RJ2XYRBMTXTIFXUEJ2EGN4RB \
  | 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: 3ea29d5f110b2779a0b7a113a219bc886e1f5e61809580ee551bf2008b80ef8a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "888d185d7b10d39f82ba1b1aa1c82c6934782bc32ded9208e2f89bab0529a1d8",
    "cross_cats_sorted": [
      "cs.GR",
      "cs.LG",
      "cs.NA",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-10-17T09:32:50Z",
    "title_canon_sha256": "229e79a870eafbb6b51a373ef4d444ed906acda72e440fc2263779d2f273599c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.07451",
    "kind": "arxiv",
    "version": 3
  }
}