Pith Number

pith:LU2UTING

pith:2013:LU2UTINGBP7G5JWMXDV7UK53R6

not attested not anchored not stored refs pending

Unsupervised Feature Learning by Deep Sparse Coding

Arthur Szlam, Koray Kavukcuoglu, Yanjun Qi, Yunlong He, Yun Wang

arxiv:1312.5783 v1 · 2013-12-20 · cs.LG · cs.CV · cs.NE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LU2UTINGBP7G5JWMXDV7UK53R6}

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	2026-05-18T03:04:07.870201Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5d3549a1a60bfe6ea6ccb8ebfa2bbb8f86cfddd1d645290f498463734f1134c1

Aliases

arxiv: 1312.5783 · arxiv_version: 1312.5783v1 · doi: 10.48550/arxiv.1312.5783 · pith_short_12: LU2UTINGBP7G · pith_short_16: LU2UTINGBP7G5JWM · pith_short_8: LU2UTING

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/LU2UTINGBP7G5JWMXDV7UK53R6 \
  | 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: 5d3549a1a60bfe6ea6ccb8ebfa2bbb8f86cfddd1d645290f498463734f1134c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13feeada6422507e01b46f3673e00c1f57ddd98f762b170430f870034c8bfae0",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.NE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-12-20T00:21:36Z",
    "title_canon_sha256": "2e8102cccdcdc8e3e5552538e949073fb98005907f3177eef097c621357825ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.5783",
    "kind": "arxiv",
    "version": 1
  }
}