Pith Number

pith:5H6ZO2VA

pith:2023:5H6ZO2VA66DT4TUYLXYPCHHLYO

not attested not anchored not stored refs pending

Private Matrix Factorization with Public Item Features

Li Zhang, Mihaela Curmei, Mukund Sundararajan, Walid Krichene

arxiv:2309.11516 v1 · 2023-09-17 · cs.IR · cs.CR · 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{5H6ZO2VA66DT4TUYLXYPCHHLYO}

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	2026-07-05T06:52:51.130566Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9fd976aa0f7873e4e985df0f11cebc3ad386961e6a1ebbe6cb0715290d8e0f7

Aliases

arxiv: 2309.11516 · arxiv_version: 2309.11516v1 · doi: 10.48550/arxiv.2309.11516 · pith_short_12: 5H6ZO2VA66DT · pith_short_16: 5H6ZO2VA66DT4TUY · pith_short_8: 5H6ZO2VA

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/5H6ZO2VA66DT4TUYLXYPCHHLYO \
  | 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: e9fd976aa0f7873e4e985df0f11cebc3ad386961e6a1ebbe6cb0715290d8e0f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d941413f8132ed0f6d048ba25901105758105c5ad725510ed83dc80af3b09542",
    "cross_cats_sorted": [
      "cs.CR",
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2023-09-17T11:13:52Z",
    "title_canon_sha256": "9b19c2de994ed114d4216b721229e267a9bbb403be6f5c0b75a08b81ffa45072"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2309.11516",
    "kind": "arxiv",
    "version": 1
  }
}