Pith Number

pith:NCMCUWNH

pith:2011:NCMCUWNHCT7DWOXGQXQYKDVKKF

not attested not anchored not stored refs pending

Emergence of scale-free leadership structure in social recommender systems

Giulio Cimini, Matus Medo, Tao Zhou, Yi-Cheng Zhang, Zi-Ke Zhang

arxiv:1103.5120 v2 · 2011-03-26 · physics.soc-ph · 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{NCMCUWNHCT7DWOXGQXQYKDVKKF}

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	2026-05-18T02:02:44.748407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68982a59a714fe3b3ae685e1850eaa515e1055c29b71339c885a54240a198b64

Aliases

arxiv: 1103.5120 · arxiv_version: 1103.5120v2 · doi: 10.48550/arxiv.1103.5120 · pith_short_12: NCMCUWNHCT7D · pith_short_16: NCMCUWNHCT7DWOXG · pith_short_8: NCMCUWNH

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/NCMCUWNHCT7DWOXGQXQYKDVKKF \
  | 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: 68982a59a714fe3b3ae685e1850eaa515e1055c29b71339c885a54240a198b64

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7220479ec94fcd375e3ac4d33f6df674c93a52de11ccf35f44eaaeff64b085e6",
    "cross_cats_sorted": [
      "cs.IR",
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2011-03-26T11:03:21Z",
    "title_canon_sha256": "95b6d7089b5bf1fd6e57b7702c01a0395c17f2b9ff4a21978cba17c1e617790e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.5120",
    "kind": "arxiv",
    "version": 2
  }
}