Pith Number

pith:NJFRUOIK

pith:2005:NJFRUOIKILOYL5OTZWQXBHWL2Z

not attested not anchored not stored refs pending

Lines of Principal Curvature near Singular End Points of Surfaces in R3

Jorge Sotomayor, Ronaldo Garcia

arxiv:math/0501422 v1 · 2005-01-24 · math.DG · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NJFRUOIKILOYL5OTZWQXBHWL2Z}

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	2026-05-18T01:05:23.814546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a4b1a390a42dd85f5d3cda1709ecbd6499529fbde9e53c9a56cdd7e80d51576

Aliases

arxiv: math/0501422 · arxiv_version: math/0501422v1 · doi: 10.48550/arxiv.math/0501422 · pith_short_12: NJFRUOIKILOY · pith_short_16: NJFRUOIKILOYL5OT · pith_short_8: NJFRUOIK

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/NJFRUOIKILOYL5OTZWQXBHWL2Z \
  | 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: 6a4b1a390a42dd85f5d3cda1709ecbd6499529fbde9e53c9a56cdd7e80d51576

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba5706d6b91fbbb4dea9cd9c3e291ac530d22cd2f06b20e08658847fab600c9d",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "",
    "primary_cat": "math.DG",
    "submitted_at": "2005-01-24T18:59:09Z",
    "title_canon_sha256": "ac3dbe4bc1a7744a4f4595a245cdfd2799fb13ddbbeed4c58c26b52e42b3853a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0501422",
    "kind": "arxiv",
    "version": 1
  }
}