Pith Number

pith:W4UBUH3S

pith:2011:W4UBUH3SVHXZKGQY5D6JTQO26I

not attested not anchored not stored refs pending

Pruning nearest neighbor cluster trees

Samory Kpotufe, Ulrike von Luxburg

arxiv:1105.0540 v2 · 2011-05-03 · stat.ML · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W4UBUH3SVHXZKGQY5D6JTQO26I}

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	2026-05-18T04:22:49.680693Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7281a1f72a9ef951a18e8fc99c1daf212a868bba4767049237e047006466daf

Aliases

arxiv: 1105.0540 · arxiv_version: 1105.0540v2 · doi: 10.48550/arxiv.1105.0540 · pith_short_12: W4UBUH3SVHXZ · pith_short_16: W4UBUH3SVHXZKGQY · pith_short_8: W4UBUH3S

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/W4UBUH3SVHXZKGQY5D6JTQO26I \
  | 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: b7281a1f72a9ef951a18e8fc99c1daf212a868bba4767049237e047006466daf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d7159e3ee11925056c6d919a7ca437b8f244ca0558a92497afcdeb24d1148f8",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2011-05-03T10:34:25Z",
    "title_canon_sha256": "45244a3b89d1186169c7848cce803e70d870dbdd9f3532dbb9767e95eec1f710"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.0540",
    "kind": "arxiv",
    "version": 2
  }
}