Pith Number

pith:RU5LJ5F2

pith:2013:RU5LJ5F2U5USITYWAVGAMIO333

not attested not anchored not stored refs pending

Probabilistic Models for Unified Collaborative and Content-Based Recommendation in Sparse-Data Environments

Alexandrin Popescul, David M Pennock, Lyle H. Ungar, Steve Lawrence

arxiv:1301.2303 v1 · 2013-01-10 · 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{RU5LJ5F2U5USITYWAVGAMIO333}

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	2026-05-18T03:36:45.437312Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8d3ab4f4baa769244f16054c0621dbdedc8ddaeadbd9416750e421665bced919

Aliases

arxiv: 1301.2303 · arxiv_version: 1301.2303v1 · doi: 10.48550/arxiv.1301.2303 · pith_short_12: RU5LJ5F2U5US · pith_short_16: RU5LJ5F2U5USITYW · pith_short_8: RU5LJ5F2

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/RU5LJ5F2U5USITYWAVGAMIO333 \
  | 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: 8d3ab4f4baa769244f16054c0621dbdedc8ddaeadbd9416750e421665bced919

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fda67b644397684459d6e835e07ce6e6d2cbd684ac5b0f0890361ea6be1dbc51",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2013-01-10T16:25:59Z",
    "title_canon_sha256": "f963f004209cfc2f8b3983a4d38db3dfbcf8d78d9e30f44a400118f8f5919216"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.2303",
    "kind": "arxiv",
    "version": 1
  }
}