Pith Number

pith:KNCXVIMV

pith:2015:KNCXVIMV43RV7GOZR7JVTYQ2VL

not attested not anchored not stored refs pending

Computational Intractability of Dictionary Learning for Sparse Representation

Hung-Wei Tseng, Meisam Razaviyayn, Zhi-Quan Luo

arxiv:1511.01776 v1 · 2015-11-05 · 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{KNCXVIMV43RV7GOZR7JVTYQ2VL}

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	2026-05-18T01:27:39.839422Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53457aa195e6e35f99d98fd359e21aaae1132d85efd82aaaf48da343dbab9e51

Aliases

arxiv: 1511.01776 · arxiv_version: 1511.01776v1 · doi: 10.48550/arxiv.1511.01776 · pith_short_12: KNCXVIMV43RV · pith_short_16: KNCXVIMV43RV7GOZ · pith_short_8: KNCXVIMV

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/KNCXVIMV43RV7GOZR7JVTYQ2VL \
  | 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: 53457aa195e6e35f99d98fd359e21aaae1132d85efd82aaaf48da343dbab9e51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3659ceaf5894d777428cf49925df1d70ff6e10282eef990f77ac34196cf95b5d",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-11-05T15:19:42Z",
    "title_canon_sha256": "6c005ad0ff8cc5f421fbc6984c4eda919e9b6c17fea53e0812e2b4e41d332180"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.01776",
    "kind": "arxiv",
    "version": 1
  }
}