Pith Number

pith:YDI2NVBI

pith:2014:YDI2NVBIFXMAMTG3PVCCFR3VOI

not attested not anchored not stored refs pending

Sparse and spurious: dictionary learning with noise and outliers

Francis Bach (SIERRA, LIENS), R\'emi Gribonval (PANAMA), Rodolphe Jenatton (CMAP)

arxiv:1407.5155 v4 · 2014-07-19 · 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{YDI2NVBIFXMAMTG3PVCCFR3VOI}

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	2026-05-18T01:34:55.411564Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c0d1a6d4282dd8064cdb7d4422c77572372deab8e9c28353625db695bfff326b

Aliases

arxiv: 1407.5155 · arxiv_version: 1407.5155v4 · doi: 10.48550/arxiv.1407.5155 · pith_short_12: YDI2NVBIFXMA · pith_short_16: YDI2NVBIFXMAMTG3 · pith_short_8: YDI2NVBI

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/YDI2NVBIFXMAMTG3PVCCFR3VOI \
  | 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: c0d1a6d4282dd8064cdb7d4422c77572372deab8e9c28353625db695bfff326b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "182eee33f02ba18d1423ee1ea91ba300d6ff59d78aa874db05e876c7eb6cbf86",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2014-07-19T06:50:19Z",
    "title_canon_sha256": "d34c4870af4f0dd6da550f39c182ad131fd23c862ed026bfd3c62112b9762985"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.5155",
    "kind": "arxiv",
    "version": 4
  }
}