Pith Number

pith:RNKV7RUU

pith:2012:RNKV7RUUYY32GFCKABDQ2CZQJG

not attested not anchored not stored refs pending

Conquering the rating bound problem in neighborhood-based collaborative filtering: a function recovery approach

Hua-Wei Shen, Junming Huang, Tao Zhou, Xiaolong Jin, Xiaoming Sun, Xue-qi Cheng

arxiv:1209.0911 v1 · 2012-09-05 · cs.IR · cs.AI · cs.HC

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	2026-05-18T03:41:29.009123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8b555fc694c637a3144a00470d0b30499a787b5e77cdffc09e358eaed56dd614

Aliases

arxiv: 1209.0911 · arxiv_version: 1209.0911v1 · doi: 10.48550/arxiv.1209.0911 · pith_short_12: RNKV7RUUYY32 · pith_short_16: RNKV7RUUYY32GFCK · pith_short_8: RNKV7RUU

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/RNKV7RUUYY32GFCKABDQ2CZQJG \
  | 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: 8b555fc694c637a3144a00470d0b30499a787b5e77cdffc09e358eaed56dd614

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3edfbdde58180dbef000fac628ccf902f7d38d03a6599f0e5af9798686552f3d",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.HC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2012-09-05T09:55:27Z",
    "title_canon_sha256": "ab3a77269ede5ef7c4142d01918e9a112de3402b930611ea6adf435edfca4ab5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.0911",
    "kind": "arxiv",
    "version": 1
  }
}