Pith Number

pith:BQ4HOZHV

pith:2008:BQ4HOZHVLHS3JKUZOKAM5CE7WO

not attested not anchored not stored refs pending

Consistent Computation of First- and Second-Order Differential Quantities for Surface Meshes

Hongyuan Zha, Xiangmin Jiao

arxiv:0803.2331 v2 · 2008-03-16 · math.NA · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BQ4HOZHVLHS3JKUZOKAM5CE7WO}

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	2026-05-18T01:18:48.243284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c387764f559e5b4aa997280ce889fb39275ec616eb7e6c548bf928463ee5757

Aliases

arxiv: 0803.2331 · arxiv_version: 0803.2331v2 · doi: 10.48550/arxiv.0803.2331 · pith_short_12: BQ4HOZHVLHS3 · pith_short_16: BQ4HOZHVLHS3JKUZ · pith_short_8: BQ4HOZHV

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/BQ4HOZHVLHS3JKUZOKAM5CE7WO \
  | 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: 0c387764f559e5b4aa997280ce889fb39275ec616eb7e6c548bf928463ee5757

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5910eba5fd545a73cbf630cbf19e40ba8073853f8bd9b223cc87439efd654084",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2008-03-16T02:15:40Z",
    "title_canon_sha256": "e0bd4fc000a2b237b7a6489a0c18869d4588d4fd8c18719bd15daa4af4724608"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0803.2331",
    "kind": "arxiv",
    "version": 2
  }
}