Pith Number

pith:PHWKYFNS

pith:2018:PHWKYFNSGJZJMVZCZZACDWHXK5

not attested not anchored not stored refs pending

Eigenvalue analogy for confidence estimation in item-based recommender systems

Maurizio Ferrari Dacrema, Paolo Cremonesi

arxiv:1809.02052 v2 · 2018-08-31 · 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{PHWKYFNSGJZJMVZCZZACDWHXK5}

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	2026-05-17T23:40:41.596260Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79ecac15b23272965722ce4021d8f75753cdbfff977c008e4423b65a3d1c8f8f

Aliases

arxiv: 1809.02052 · arxiv_version: 1809.02052v2 · doi: 10.48550/arxiv.1809.02052 · pith_short_12: PHWKYFNSGJZJ · pith_short_16: PHWKYFNSGJZJMVZC · pith_short_8: PHWKYFNS

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/PHWKYFNSGJZJMVZCZZACDWHXK5 \
  | 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: 79ecac15b23272965722ce4021d8f75753cdbfff977c008e4423b65a3d1c8f8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "051c2cfb80f9c89889800f29962607ef6868958d5ea9f9cb755bdd17024d2ce0",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2018-08-31T10:22:19Z",
    "title_canon_sha256": "65a25cf88097881ab5c53cc88a34ec6a66509b62013b18d6d736cde8f13ac878"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.02052",
    "kind": "arxiv",
    "version": 2
  }
}