Pith Number

pith:R2IPPVHL

pith:2003:R2IPPVHL2QAFZSFO6QJGLTQO53

not attested not anchored not stored refs pending

Algorithmic Clustering of Music

Paul Vitanyi (CWI, Ronald de Wolf (CWI), Rudi Cilibrasi (CWI), University of Amsterdam)

arxiv:cs/0303025 v1 · 2003-03-24 · cs.SD · cs.LG · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R2IPPVHL2QAFZSFO6QJGLTQO53}

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	2026-05-18T01:06:49.403117Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e90f7d4ebd4005cc8aef41265ce0eeef58f97362a7472ba3a29228357588ed7

Aliases

arxiv: cs/0303025 · arxiv_version: cs/0303025v1 · doi: 10.48550/arxiv.cs/0303025 · pith_short_12: R2IPPVHL2QAF · pith_short_16: R2IPPVHL2QAFZSFO · pith_short_8: R2IPPVHL

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/R2IPPVHL2QAFZSFO6QJGLTQO53 \
  | 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: 8e90f7d4ebd4005cc8aef41265ce0eeef58f97362a7472ba3a29228357588ed7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61052edbb9d866a6bab0df68bccc7756719b678aeaa42d2ff011ab3cc0f803ad",
    "cross_cats_sorted": [
      "cs.LG",
      "physics.data-an"
    ],
    "license": "",
    "primary_cat": "cs.SD",
    "submitted_at": "2003-03-24T16:01:46Z",
    "title_canon_sha256": "4eb5c665d0f67e8c59779d1d491db81b972b9ee64f36750a1b5e7a42a7627e3d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0303025",
    "kind": "arxiv",
    "version": 1
  }
}