Pith Number

pith:2QLMMHJG

pith:2011:2QLMMHJGHVBAGECOUN2G6RDCO3

not attested not anchored not stored refs pending

Subjective Collaborative Filtering

Calogero Zarba, Fabrizio Caruso, Giovanni Giuffrida

arxiv:1101.2834 v2 · 2011-01-14 · cs.IR · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2QLMMHJGHVBAGECOUN2G6RDCO3}

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	2026-05-18T04:31:30.745909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d416c61d263d4203104ea3746f446276d2b2e547d6373882d657d1accff0e2dd

Aliases

arxiv: 1101.2834 · arxiv_version: 1101.2834v2 · doi: 10.48550/arxiv.1101.2834 · pith_short_12: 2QLMMHJGHVBA · pith_short_16: 2QLMMHJGHVBAGECO · pith_short_8: 2QLMMHJG

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/2QLMMHJGHVBAGECOUN2G6RDCO3 \
  | 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: d416c61d263d4203104ea3746f446276d2b2e547d6373882d657d1accff0e2dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c152498817e1c456b67c2d3e155d409a1e4b92b3a389c2bc6716c1485aa3c768",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2011-01-14T15:19:22Z",
    "title_canon_sha256": "4c6fa2d68806118b843a0d3280edd847216a6f40021e1c439c2127850644d527"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.2834",
    "kind": "arxiv",
    "version": 2
  }
}