Pith Number

pith:SBFFQVRM

pith:2013:SBFFQVRMINDEZ5YNP6IHNX5NZ3

not attested not anchored not stored refs pending

Privacy Preserving Recommendation System Based on Groups

Pan Hui, Paul Cuff, Sanjeev Kulkarni, Shang Shang, Yuk Hui

arxiv:1305.0540 v2 · 2013-05-02 · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SBFFQVRMINDEZ5YNP6IHNX5NZ3}

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	2026-05-18T03:25:58.054207Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

904a58562c43464cf70d7f9076dfadced2ebcf0dee370a5f8563a9ce16db1f17

Aliases

arxiv: 1305.0540 · arxiv_version: 1305.0540v2 · doi: 10.48550/arxiv.1305.0540 · pith_short_12: SBFFQVRMINDE · pith_short_16: SBFFQVRMINDEZ5YN · pith_short_8: SBFFQVRM

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/SBFFQVRMINDEZ5YNP6IHNX5NZ3 \
  | 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: 904a58562c43464cf70d7f9076dfadced2ebcf0dee370a5f8563a9ce16db1f17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b17ee893358def88b6c7f606476eaa8d75f0f94da22f63626b419a8d8e132820",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2013-05-02T19:17:08Z",
    "title_canon_sha256": "4b2dd25c07a761dfeecc730ac684c00f0921f0112eaa69c9ae204a077bc4c8b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.0540",
    "kind": "arxiv",
    "version": 2
  }
}