Pith Number

pith:4WDDOLR2

pith:2012:4WDDOLR2XSUEGLY7ZJAPR2FVNH

not attested not anchored not stored refs pending

Parameter-Free Spectral Kernel Learning

Ivor W. Tsang, Qi Mao

arxiv:1203.3495 v1 · 2012-03-15 · cs.LG · 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{4WDDOLR2XSUEGLY7ZJAPR2FVNH}

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	2026-05-18T04:00:00.244289Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e586372e3abca8432f1fca40f8e8b569d4bf8c8697132c651128f1fc21499dda

Aliases

arxiv: 1203.3495 · arxiv_version: 1203.3495v1 · doi: 10.48550/arxiv.1203.3495 · pith_short_12: 4WDDOLR2XSUE · pith_short_16: 4WDDOLR2XSUEGLY7 · pith_short_8: 4WDDOLR2

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/4WDDOLR2XSUEGLY7ZJAPR2FVNH \
  | 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: e586372e3abca8432f1fca40f8e8b569d4bf8c8697132c651128f1fc21499dda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca33cfeaea838cec3cb77a3c06787a8a7b249107ebe8068d2495f2b66da43f76",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2012-03-15T11:17:56Z",
    "title_canon_sha256": "65e92217e343135fe89ff4c20906b855cdb593b916e078a05ee956796d411679"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.3495",
    "kind": "arxiv",
    "version": 1
  }
}