Pith Number

pith:B7F34ACD

pith:2015:B7F34ACDYDMVD2U5QM7LFJNXU5

not attested not anchored not stored refs pending

Regret Guarantees for Item-Item Collaborative Filtering

Devavrat Shah, Guy Bresler, Luis F. Voloch

arxiv:1507.05371 v2 · 2015-07-20 · cs.LG · cs.IR · cs.IT · math.IT · stat.ML

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

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	2026-05-18T01:23:12.080686Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fcbbe0043c0d951ea9d833eb2a5b7a74370e3b4102dce1335481f4d808c8a7f

Aliases

arxiv: 1507.05371 · arxiv_version: 1507.05371v2 · doi: 10.48550/arxiv.1507.05371 · pith_short_12: B7F34ACDYDMV · pith_short_16: B7F34ACDYDMVD2U5 · pith_short_8: B7F34ACD

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/B7F34ACDYDMVD2U5QM7LFJNXU5 \
  | 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: 0fcbbe0043c0d951ea9d833eb2a5b7a74370e3b4102dce1335481f4d808c8a7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "289a09d9be04f1e5ab5db630458b5e5f0aee1b23c0aa200ba0ef7cde31403b0b",
    "cross_cats_sorted": [
      "cs.IR",
      "cs.IT",
      "math.IT",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-07-20T02:45:01Z",
    "title_canon_sha256": "a746dcaa525f117b055f95953d5ac48790eb590f31fdac8cb83ed28eabb7d6d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.05371",
    "kind": "arxiv",
    "version": 2
  }
}