Pith Number

pith:XTNUZW2V

pith:2016:XTNUZW2VHTXMR2XF4ARVJYCAI6

not attested not anchored not stored refs pending

Preconditioning Kernel Matrices

John P. Cunningham, Kurt Cutajar, Maurizio Filippone, Michael A. Osborne

arxiv:1602.06693 v2 · 2016-02-22 · stat.ML · stat.CO · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XTNUZW2VHTXMR2XF4ARVJYCAI6}

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	2026-05-18T01:13:39.751368Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bcdb4cdb553ceec8eae5e02354e0404786ea1833a05dfd9ce9282dd07549b6b2

Aliases

arxiv: 1602.06693 · arxiv_version: 1602.06693v2 · doi: 10.48550/arxiv.1602.06693 · pith_short_12: XTNUZW2VHTXM · pith_short_16: XTNUZW2VHTXMR2XF · pith_short_8: XTNUZW2V

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/XTNUZW2VHTXMR2XF4ARVJYCAI6 \
  | 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: bcdb4cdb553ceec8eae5e02354e0404786ea1833a05dfd9ce9282dd07549b6b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "58129c168d224c741228c5b287d57a4a77ee1f642e899bb76713c0e495e132c6",
    "cross_cats_sorted": [
      "stat.CO",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2016-02-22T09:21:48Z",
    "title_canon_sha256": "1fac899706ba120441968ab51377f0350346e1288958f923af955ea2f73ec36d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.06693",
    "kind": "arxiv",
    "version": 2
  }
}