Pith Number

pith:MBHAGHO6

pith:2012:MBHAGHO643ZP7MMLVCLGUHOHVO

not attested not anchored not stored refs pending

Four Degrees of Separation, Really

Paolo Boldi, Sebastiano Vigna

arxiv:1205.5509 v1 · 2012-05-24 · 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{MBHAGHO643ZP7MMLVCLGUHOHVO}

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	2026-05-18T03:55:00.924675Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

604e031ddee6f2ffb18ba8966a1dc7aba27648250ecca8bce962bc0a455581ed

Aliases

arxiv: 1205.5509 · arxiv_version: 1205.5509v1 · doi: 10.48550/arxiv.1205.5509 · pith_short_12: MBHAGHO643ZP · pith_short_16: MBHAGHO643ZP7MML · pith_short_8: MBHAGHO6

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/MBHAGHO643ZP7MMLVCLGUHOHVO \
  | 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: 604e031ddee6f2ffb18ba8966a1dc7aba27648250ecca8bce962bc0a455581ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "556e775676fe7d9700d380e12766a504a9896cbd0a0300e79c23ca23a0b53830",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2012-05-24T17:33:18Z",
    "title_canon_sha256": "4bc4605d141eef1c3a60f2630b98c46a51b1b1d2e1385993f62d0678f91da494"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.5509",
    "kind": "arxiv",
    "version": 1
  }
}