Pith Number

pith:2XXL37TT

pith:2011:2XXL37TTYRSNI5NR2MN4IQVA27

not attested not anchored not stored refs pending

Closed-form EM for Sparse Coding and its Application to Source Separation

Abdul-Saboor Sheikh, J\"org L\"ucke

arxiv:1105.2493 v6 · 2011-05-12 · 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{2XXL37TTYRSNI5NR2MN4IQVA27}

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	2026-05-18T04:01:02.013286Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5eebdfe73c464d475b1d31bc442a0d7e84a4f31b049b981dcb2712671f9503e

Aliases

arxiv: 1105.2493 · arxiv_version: 1105.2493v6 · doi: 10.48550/arxiv.1105.2493 · pith_short_12: 2XXL37TTYRSN · pith_short_16: 2XXL37TTYRSNI5NR · pith_short_8: 2XXL37TT

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/2XXL37TTYRSNI5NR2MN4IQVA27 \
  | 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: d5eebdfe73c464d475b1d31bc442a0d7e84a4f31b049b981dcb2712671f9503e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9062485e52b18d7a952a3c1431310853ab81ebcce8d0602d4b73a39f86b2b4fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2011-05-12T14:50:09Z",
    "title_canon_sha256": "8f3b68ff1562b3c4919e6a126d0c91d8bbb885c72c6cc8b984bf6aa00abc908c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.2493",
    "kind": "arxiv",
    "version": 6
  }
}