Pith Number

pith:IRLXK4SJ

pith:2010:IRLXK4SJADBHHTYACTYTOIMNHL

not attested not anchored not stored refs pending

Optimal topological simplification of discrete functions on surfaces

Carsten Lange, Max Wardetzky, Ulrich Bauer

arxiv:1001.1269 v2 · 2010-01-08 · cs.CG · math.CO · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IRLXK4SJADBHHTYACTYTOIMNHL}

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	2026-05-18T02:16:51.687534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

445775724900c273cf0014f137218d3ac046355b459b755d3c050be285b90ff2

Aliases

arxiv: 1001.1269 · arxiv_version: 1001.1269v2 · doi: 10.48550/arxiv.1001.1269 · pith_short_12: IRLXK4SJADBH · pith_short_16: IRLXK4SJADBHHTYA · pith_short_8: IRLXK4SJ

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/IRLXK4SJADBHHTYACTYTOIMNHL \
  | 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: 445775724900c273cf0014f137218d3ac046355b459b755d3c050be285b90ff2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fa0af0c678c91557421dadfcb162ab43434810b59b1506280f208d8778cb2e1",
    "cross_cats_sorted": [
      "math.CO",
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2010-01-08T14:50:47Z",
    "title_canon_sha256": "5ff4462a677eaac03ec5174c09e84434b0aef727713d5a15a673b83211ff7db8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.1269",
    "kind": "arxiv",
    "version": 2
  }
}