Pith Number

pith:B67FMDBS

pith:2007:B67FMDBS5F2ZXE2GAHQSTUXXS4

not attested not anchored not stored refs pending

Improved Collaborative Filtering Algorithm via Information Transformation

Bing-Hong Wang, Jian-Guo Liu, Qiang Guo

arxiv:0712.3807 v3 · 2007-12-26 · cs.LG · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B67FMDBS5F2ZXE2GAHQSTUXXS4}

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	2026-05-18T02:16:02.535287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fbe560c32e9759b934601e129d2f79732e5303a46ed85aa792d9df5f030b21f

Aliases

arxiv: 0712.3807 · arxiv_version: 0712.3807v3 · doi: 10.48550/arxiv.0712.3807 · pith_short_12: B67FMDBS5F2Z · pith_short_16: B67FMDBS5F2ZXE2G · pith_short_8: B67FMDBS

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/B67FMDBS5F2ZXE2GAHQSTUXXS4 \
  | 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: 0fbe560c32e9759b934601e129d2f79732e5303a46ed85aa792d9df5f030b21f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b23185659217a4bc57095df350e8a902beb3bb65efd40aa15a9efddad8e97c05",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2007-12-26T14:25:18Z",
    "title_canon_sha256": "300de9d411f7b5e4f684bd14153d052d2fe22a411ae5a7c48b8f70547be5c908"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0712.3807",
    "kind": "arxiv",
    "version": 3
  }
}