Pith Number

pith:3VN4WRXT

pith:2015:3VN4WRXTHTLG7ODXV2MHOLMA2C

not attested not anchored not stored refs pending

Efficient Sum of Outer Products Dictionary Learning (SOUP-DIL) - The $\ell_0$ Method

Jeffrey A. Fessler, Raj Rao Nadakuditi, Saiprasad Ravishankar

arxiv:1511.08842 v2 · 2015-11-27 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3VN4WRXTHTLG7ODXV2MHOLMA2C}

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	2026-05-18T00:46:02.761394Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd5bcb46f33cd66fb877ae98772d80d0aab198e6c3cfe3c8cb3081243d4a9d10

Aliases

arxiv: 1511.08842 · arxiv_version: 1511.08842v2 · doi: 10.48550/arxiv.1511.08842 · pith_short_12: 3VN4WRXTHTLG · pith_short_16: 3VN4WRXTHTLG7ODX · pith_short_8: 3VN4WRXT

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/3VN4WRXTHTLG7ODXV2MHOLMA2C \
  | 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: dd5bcb46f33cd66fb877ae98772d80d0aab198e6c3cfe3c8cb3081243d4a9d10

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1e7de77078caba07969e0fab0d1e87326bef8193712d3ccd54f0cf44bbf9947",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-11-27T22:32:43Z",
    "title_canon_sha256": "cd73a9b109de7d787d3328ecff0c6230d98e7aaebc23aa3988d837ffe1c1aef9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.08842",
    "kind": "arxiv",
    "version": 2
  }
}