Pith Number

pith:I23UXFGL

pith:2012:I23UXFGLJSBYQXBOQ2G3FEDCP6

not attested not anchored not stored refs pending

Recommender Systems

Chi Ho Yeung, Linyuan L\"u, Matus Medo, Tao Zhou, Yi-Cheng Zhang, Zi-Ke Zhang

arxiv:1202.1112 v1 · 2012-02-06 · physics.soc-ph · cond-mat.stat-mech · 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{I23UXFGLJSBYQXBOQ2G3FEDCP6}

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	2026-05-18T01:58:33.525287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46b74b94cb4c83885c2e868db290627fa420c327448a8c4789cfa6113b404881

Aliases

arxiv: 1202.1112 · arxiv_version: 1202.1112v1 · doi: 10.48550/arxiv.1202.1112 · pith_short_12: I23UXFGLJSBY · pith_short_16: I23UXFGLJSBYQXBO · pith_short_8: I23UXFGL

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/I23UXFGLJSBYQXBOQ2G3FEDCP6 \
  | 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: 46b74b94cb4c83885c2e868db290627fa420c327448a8c4789cfa6113b404881

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cce189c25845c8c9dfffeb5eadae1651b49944dc62f72396e55c83079d52b78",
    "cross_cats_sorted": [
      "cond-mat.stat-mech",
      "cs.IR",
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2012-02-06T12:15:45Z",
    "title_canon_sha256": "a42c4d41d55266a7f9883a6c3ba9ab437be01a9edd3145decb811ee0928903c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.1112",
    "kind": "arxiv",
    "version": 1
  }
}