Pith Number

pith:PKXPBASJ

pith:2019:PKXPBASJVGASTPXSKI6XL24UNJ

not attested not anchored not stored refs pending

On the Difficulty of Evaluating Baselines: A Study on Recommender Systems

Li Zhang, Steffen Rendle, Yehuda Koren

arxiv:1905.01395 v1 · 2019-05-04 · cs.IR · 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{PKXPBASJVGASTPXSKI6XL24UNJ}

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	2026-05-17T23:47:00.807666Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7aaef08249a98129bef2523d75eb946a6faf859f84ff8a1a54444a9af70a6673

Aliases

arxiv: 1905.01395 · arxiv_version: 1905.01395v1 · doi: 10.48550/arxiv.1905.01395 · pith_short_12: PKXPBASJVGAS · pith_short_16: PKXPBASJVGASTPXS · pith_short_8: PKXPBASJ

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/PKXPBASJVGASTPXSKI6XL24UNJ \
  | 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: 7aaef08249a98129bef2523d75eb946a6faf859f84ff8a1a54444a9af70a6673

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a23bbb0bb635a0316adceb7177213880d304d825ab5dfb4c6d7b6202e45dece",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2019-05-04T00:27:22Z",
    "title_canon_sha256": "b5bf90d6530d6e614f7b8d4f3dfb72ed850a34b3f457e2c5e156cb839d8eb4e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.01395",
    "kind": "arxiv",
    "version": 1
  }
}