Pith Number

pith:QXKP4X3P

pith:2015:QXKP4X3PGSOOETBS6HQ4PZH2GG

not attested not anchored not stored refs pending

Direct Estimation of the Derivative of Quadratic Mutual Information with Application in Supervised Dimension Reduction

Hiroaki Sasaki, Masashi Sugiyama, Voot Tangkaratt

arxiv:1508.01019 v1 · 2015-08-05 · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QXKP4X3PGSOOETBS6HQ4PZH2GG}

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	2026-05-18T01:35:44.237616Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85d4fe5f6f349ce24c32f1e1c7e4fa31acc57a36dce5d753876008d37c3dfafa

Aliases

arxiv: 1508.01019 · arxiv_version: 1508.01019v1 · doi: 10.48550/arxiv.1508.01019 · pith_short_12: QXKP4X3PGSOO · pith_short_16: QXKP4X3PGSOOETBS · pith_short_8: QXKP4X3P

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/QXKP4X3PGSOOETBS6HQ4PZH2GG \
  | 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: 85d4fe5f6f349ce24c32f1e1c7e4fa31acc57a36dce5d753876008d37c3dfafa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfb6c54b77eb24725aa2427a21d80f0e25ec60d54a7e334039c9dec6d94298b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2015-08-05T09:44:32Z",
    "title_canon_sha256": "bed1fcfbf14a9be69391251d1957ab4f82dd6ab8a433cf14ae72e1f1af52eecb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.01019",
    "kind": "arxiv",
    "version": 1
  }
}