Pith Number

pith:GKINQHVK

pith:2015:GKINQHVKFLBENJHNLWFZVAALPF

not attested not anchored not stored refs pending

Compressed Nonnegative Matrix Factorization is Fast and Accurate

Guillermo Sapiro, Mariano Tepper

arxiv:1505.04650 v2 · 2015-05-18 · 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{GKINQHVKFLBENJHNLWFZVAALPF}

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	2026-05-18T01:15:46.746463Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3290d81eaa2ac246a4ed5d8b9a800b79672872ee2779f948f5210c450ed7d1ce

Aliases

arxiv: 1505.04650 · arxiv_version: 1505.04650v2 · doi: 10.48550/arxiv.1505.04650 · pith_short_12: GKINQHVKFLBE · pith_short_16: GKINQHVKFLBENJHN · pith_short_8: GKINQHVK

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/GKINQHVKFLBENJHNLWFZVAALPF \
  | 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: 3290d81eaa2ac246a4ed5d8b9a800b79672872ee2779f948f5210c450ed7d1ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9041748555a860c183c2acbc6b30c2af02cbe5f0af416fcb77412db8cdbe40e",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-05-18T14:12:22Z",
    "title_canon_sha256": "a2060540e1e1d8a974083f825fe118bd9c4c7547d6b113a4bc40710f13ccf88c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.04650",
    "kind": "arxiv",
    "version": 2
  }
}