Pith Number

pith:U4LS6IR4

pith:2011:U4LS6IR4AXURTOYCSBCWIRQUUF

not attested not anchored not stored refs pending

The Anatomy of the Facebook Social Graph

Brian Karrer, Cameron Marlow, Johan Ugander, Lars Backstrom

arxiv:1111.4503 v1 · 2011-11-18 · cs.SI · 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{U4LS6IR4AXURTOYCSBCWIRQUUF}

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.

Cited by

2 papers in Pith

Beyond Individual Mimicry: Constructing Human-Like Social network with Graph-Augmented LLM Agents

Causal inference for social network formation

Receipt and verification

First computed	2026-05-18T04:08:03.172949Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7172f223c05e919bb029045644614a1514ed9fb57bbe5a7a263baadd5b138d3

Aliases

arxiv: 1111.4503 · arxiv_version: 1111.4503v1 · doi: 10.48550/arxiv.1111.4503 · pith_short_12: U4LS6IR4AXUR · pith_short_16: U4LS6IR4AXURTOYC · pith_short_8: U4LS6IR4

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/U4LS6IR4AXURTOYCSBCWIRQUUF \
  | 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: a7172f223c05e919bb029045644614a1514ed9fb57bbe5a7a263baadd5b138d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93bd6535e9f9d1242a22c8d9f2c6e642717e7a6a4b0eef8e4e5dd82d36c9218a",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2011-11-18T21:46:32Z",
    "title_canon_sha256": "e04047e8e2365f9ca044c4f51e6c53930d2724ccaa8cd0677e9e20a1f8c9d856"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.4503",
    "kind": "arxiv",
    "version": 1
  }
}