First computed	2026-05-18T03:27:31.430035Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b9f50402977611f6ca24185a0f952d2fcc88ecc84616e0210fa035893cfaf0d

Aliases

arxiv: 1304.5634 · arxiv_version: 1304.5634v1 · doi: 10.48550/arxiv.1304.5634 · pith_short_12: FOPVAQBJO5QR · pith_short_16: FOPVAQBJO5QR63FC · pith_short_8: FOPVAQBJ

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/FOPVAQBJO5QR63FCIGC2B6KS2L \
  | 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: 2b9f50402977611f6ca24185a0f952d2fcc88ecc84616e0210fa035893cfaf0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b510164b26f921ea54eb0bfa987636f26874d9c16dc5630f8a9e6fabe87c701a",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-04-20T14:43:35Z",
    "title_canon_sha256": "991b8e6516b4b576a5ed6966f8f1fc57b5735034e5108c6360e98ab2127334eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.5634",
    "kind": "arxiv",
    "version": 1
  }
}