Pith Number

pith:IRQILX3Q

pith:2019:IRQILX3Q6NL5XOIA7RNH4DURAC

not attested not anchored not stored refs pending

A robust direct modeling method for quadric B-rep models based on geometry-topology inconsistency tracking

Hsi-Yung Feng, Qiang Zou

arxiv:1906.08455 v2 · 2019-06-20 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IRQILX3Q6NL5XOIA7RNH4DURAC}

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	2026-07-05T00:52:06.034537Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

446085df70f357dbb900fc5a7e0e9100a03cf9e50aa6972df96dee786cd05e83

Aliases

arxiv: 1906.08455 · arxiv_version: 1906.08455v2 · doi: 10.48550/arxiv.1906.08455 · pith_short_12: IRQILX3Q6NL5 · pith_short_16: IRQILX3Q6NL5XOIA · pith_short_8: IRQILX3Q

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/IRQILX3Q6NL5XOIA7RNH4DURAC \
  | 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: 446085df70f357dbb900fc5a7e0e9100a03cf9e50aa6972df96dee786cd05e83

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29607e55217c172a87810cd519547f7789d6f200bc955c8907fc0bd715cea028",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2019-06-20T06:10:47Z",
    "title_canon_sha256": "33eb53f5b40849841a8358a16499aaad6ea8ab4f922580e5f90dd490d49f8600"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.08455",
    "kind": "arxiv",
    "version": 2
  }
}