Pith Number

pith:H4BWVV42

pith:2013:H4BWVV42E6FWMM37CRZWIA5ZUV

not attested not anchored not stored refs pending

A fast and robust algorithm to count topologically persistent holes in noisy clouds

Vitaliy Kurlin

arxiv:1312.1492 v3 · 2013-12-05 · cs.CG · cs.CV · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H4BWVV42E6FWMM37CRZWIA5ZUV}

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	2026-05-18T00:57:52.471623Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f036ad79a278b66337f14736403b9a55203b9de81ff257cdb0a57eeea7cdfd8

Aliases

arxiv: 1312.1492 · arxiv_version: 1312.1492v3 · doi: 10.48550/arxiv.1312.1492 · pith_short_12: H4BWVV42E6FW · pith_short_16: H4BWVV42E6FWMM37 · pith_short_8: H4BWVV42

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/H4BWVV42E6FWMM37CRZWIA5ZUV \
  | 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: 3f036ad79a278b66337f14736403b9a55203b9de81ff257cdb0a57eeea7cdfd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5324da2c3a26fbfd2724197ba80d4b28e71ef5ce6ae5335e290f46974e696c3",
    "cross_cats_sorted": [
      "cs.CV",
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2013-12-05T10:24:59Z",
    "title_canon_sha256": "11f71561957b9a45823be0e490be7af394f656d878bb70ff648f8fb500f644fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.1492",
    "kind": "arxiv",
    "version": 3
  }
}