Pith Number

pith:QUNOZQGJ

pith:2011:QUNOZQGJLZH2C5UY6E6F6UHS2D

not attested not anchored not stored refs pending

Improving Recommendation Quality by Merging Collaborative Filtering and Social Relationships

Alessandro Provetti, Emilio Ferrara, Giacomo Fiumara, Pasquale De Meo

arxiv:1109.6698 v1 · 2011-09-30 · cs.SI · cs.IR · physics.soc-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QUNOZQGJLZH2C5UY6E6F6UHS2D}

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	2026-05-18T04:02:37.372617Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

851aecc0c95e4fa17698f13c5f50f2d0f1d50ddf42656d8d40d6952bbc569adc

Aliases

arxiv: 1109.6698 · arxiv_version: 1109.6698v1 · doi: 10.48550/arxiv.1109.6698 · pith_short_12: QUNOZQGJLZH2 · pith_short_16: QUNOZQGJLZH2C5UY · pith_short_8: QUNOZQGJ

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/QUNOZQGJLZH2C5UY6E6F6UHS2D \
  | 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: 851aecc0c95e4fa17698f13c5f50f2d0f1d50ddf42656d8d40d6952bbc569adc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80f7abcd162c1d508f458d3936f6cf584c1399251b88d13c3b137cbea537ea97",
    "cross_cats_sorted": [
      "cs.IR",
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2011-09-30T00:45:17Z",
    "title_canon_sha256": "cfe9027d5dbc5f0003673b78404e141eecb06a490e82b8aafc441bfecd2c8be4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6698",
    "kind": "arxiv",
    "version": 1
  }
}