Pith Number

pith:PU25K6OF

pith:2015:PU25K6OF23T54Z5MTVNUDTRAK6

not attested not anchored not stored refs pending

A Direct Approach for Sparse Quadratic Discriminant Analysis

Binyan Jiang, Chenlei Leng, Xiangyu Wang

arxiv:1510.00084 v4 · 2015-10-01 · stat.ME · stat.CO · 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{PU25K6OF23T54Z5MTVNUDTRAK6}

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	2026-05-18T00:06:31.231443Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d35d579c5d6e7de67ac9d5b41ce205781217459f6b9dab15a30dd8f438cfb48

Aliases

arxiv: 1510.00084 · arxiv_version: 1510.00084v4 · doi: 10.48550/arxiv.1510.00084 · pith_short_12: PU25K6OF23T5 · pith_short_16: PU25K6OF23T54Z5M · pith_short_8: PU25K6OF

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/PU25K6OF23T54Z5MTVNUDTRAK6 \
  | 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: 7d35d579c5d6e7de67ac9d5b41ce205781217459f6b9dab15a30dd8f438cfb48

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e17d41db5d6685629cab4b4cc8548d899d7619ad72d08e4b1b81b2d0eb0c8bba",
    "cross_cats_sorted": [
      "stat.CO",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-10-01T01:24:20Z",
    "title_canon_sha256": "2771d4f3aba8a4ab2ee7e384b5b45515620bb5bf95cddaeeee6444c16a3fa22e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.00084",
    "kind": "arxiv",
    "version": 4
  }
}