Pith Number

pith:NPBJ2PZC

pith:2015:NPBJ2PZCSICEPU3KKE3254DVZ2

not attested not anchored not stored refs pending

Tests for separability in nonparametric covariance operators of random surfaces

Davide Pigoli, John A. D. Aston, Shahin Tavakoli

arxiv:1505.02023 v4 · 2015-05-08 · stat.ME · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NPBJ2PZCSICEPU3KKE3254DVZ2}

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	2026-05-18T00:41:23.412555Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bc29d3f22920447d36a5137aef075ce8094ba68335de22c756d46237afaf71f

Aliases

arxiv: 1505.02023 · arxiv_version: 1505.02023v4 · doi: 10.48550/arxiv.1505.02023 · pith_short_12: NPBJ2PZCSICE · pith_short_16: NPBJ2PZCSICEPU3K · pith_short_8: NPBJ2PZC

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/NPBJ2PZCSICEPU3KKE3254DVZ2 \
  | 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: 6bc29d3f22920447d36a5137aef075ce8094ba68335de22c756d46237afaf71f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e35ab57eaabf12cd384cf5e8b1f0af8e81865bda18ab8af3713ce78e1ef0011b",
    "cross_cats_sorted": [
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-05-08T13:01:37Z",
    "title_canon_sha256": "57193f5b0da495d38807b380088a6b4ea37397d9a007eaeff99af85d1f6de57b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.02023",
    "kind": "arxiv",
    "version": 4
  }
}