Pith Number

pith:2BQQJ2YF

pith:2011:2BQQJ2YFCBRUTOBQ7EYPRX66R3

not attested not anchored not stored refs pending

A Large-Scale Community Structure Analysis In Facebook

Emilio Ferrara

arxiv:1106.2503 v5 · 2011-06-13 · cs.SI · cs.CY · 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{2BQQJ2YFCBRUTOBQ7EYPRX66R3}

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	2026-05-18T03:20:18.929835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d06104eb05106349b830f930f8dfde8edefff344a406f58bc857372d581b1608

Aliases

arxiv: 1106.2503 · arxiv_version: 1106.2503v5 · doi: 10.48550/arxiv.1106.2503 · pith_short_12: 2BQQJ2YFCBRU · pith_short_16: 2BQQJ2YFCBRUTOBQ · pith_short_8: 2BQQJ2YF

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/2BQQJ2YFCBRUTOBQ7EYPRX66R3 \
  | 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: d06104eb05106349b830f930f8dfde8edefff344a406f58bc857372d581b1608

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8e5f3fe3bb75345243d891cdf4467b52790fcfe153c04bf4f6adc3d98ff3cc6",
    "cross_cats_sorted": [
      "cs.CY",
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2011-06-13T17:42:32Z",
    "title_canon_sha256": "2a85c55a37872bd2df312368fc32334f88f53e07b040962b8f53b9ca3a10f919"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.2503",
    "kind": "arxiv",
    "version": 5
  }
}