Pith Number

pith:D4RCRGUS

pith:2019:D4RCRGUSQPWGZRFWED3V2DIPSG

not attested not anchored not stored refs pending

Scalable Probabilistic Matrix Factorization with Graph-Based Priors

Hiroshi Mamitsuka, Jaakko Peltonen, Jonathan Strahl, Samuel Kaski

arxiv:1908.09393 v2 · 2019-08-25 · 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{D4RCRGUSQPWGZRFWED3V2DIPSG}

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	2026-07-05T02:00:08.785148Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f22289a9283ec6cc4b620f75d0d0f91bf9fea17dd6b8e8b8c254ac9a4406c88

Aliases

arxiv: 1908.09393 · arxiv_version: 1908.09393v2 · doi: 10.48550/arxiv.1908.09393 · pith_short_12: D4RCRGUSQPWG · pith_short_16: D4RCRGUSQPWGZRFW · pith_short_8: D4RCRGUS

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/D4RCRGUSQPWGZRFWED3V2DIPSG \
  | 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: 1f22289a9283ec6cc4b620f75d0d0f91bf9fea17dd6b8e8b8c254ac9a4406c88

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ecaf73ba028810b79e85097b7c457640cec55bce38bc940452f24725567afca1",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-08-25T21:21:18Z",
    "title_canon_sha256": "3116a6ef44409ea7cf8d0c616ff8994a165dde4a084fdacd9003f358d8523c07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.09393",
    "kind": "arxiv",
    "version": 2
  }
}