Pith Number

pith:BEWDQWAZ

pith:2019:BEWDQWAZL3LOUC2H2DG7ASBTCA

not attested not anchored not stored refs pending

SPMF: A Social Trust and Preference Segmentation-based Matrix Factorization Recommendation Algorithm

Baogui Xin, Wei Peng

arxiv:1903.04489 v1 · 2019-03-11 · cs.IR · 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{BEWDQWAZL3LOUC2H2DG7ASBTCA}

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	2026-05-17T23:51:29.454472Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

092c3858195ed6ea0b47d0cdf04833102adc992037867a2f9c5c8d3c5473417a

Aliases

arxiv: 1903.04489 · arxiv_version: 1903.04489v1 · doi: 10.48550/arxiv.1903.04489 · pith_short_12: BEWDQWAZL3LO · pith_short_16: BEWDQWAZL3LOUC2H · pith_short_8: BEWDQWAZ

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/BEWDQWAZL3LOUC2H2DG7ASBTCA \
  | 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: 092c3858195ed6ea0b47d0cdf04833102adc992037867a2f9c5c8d3c5473417a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4123f0defcdb07f06afd148311cef363099ddb89bdb4a7d305f7d0eca254456",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2019-03-11T14:18:43Z",
    "title_canon_sha256": "5a31dbad12f8b3d86bf411d91de12ee8c71d17e465d4f2832468e662cce72d86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.04489",
    "kind": "arxiv",
    "version": 1
  }
}