Pith Number

pith:3P6SAA7D

pith:2013:3P6SAA7DYHUJULRVPPMO4EVBDH

not attested not anchored not stored refs pending

Delineating geographical regions with networks of human interactions in an extensive set of countries

Carlo Ratti, Michael Szell, Riccardo Campari, Stanislav Sobolevsky, Thomas Couronn\'e, Zbigniew Smoreda

arxiv:1310.1829 v2 · 2013-10-07 · 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{3P6SAA7DYHUJULRVPPMO4EVBDH}

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	2026-05-18T03:04:08.144936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbfd2003e3c1e89a2e357bd8ee12a119e4ae41646ff24fe9f2a5c74d10af72a3

Aliases

arxiv: 1310.1829 · arxiv_version: 1310.1829v2 · doi: 10.48550/arxiv.1310.1829 · pith_short_12: 3P6SAA7DYHUJ · pith_short_16: 3P6SAA7DYHUJULRV · pith_short_8: 3P6SAA7D

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/3P6SAA7DYHUJULRVPPMO4EVBDH \
  | 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: dbfd2003e3c1e89a2e357bd8ee12a119e4ae41646ff24fe9f2a5c74d10af72a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b056fe0b923ff65fb7d473549e98a2bc3882f1b534a2ff7ef1c6365e65d13c1e",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2013-10-07T15:50:31Z",
    "title_canon_sha256": "b0a3989a783ea84cb29b0090b6940cd153665a53c7864f7874939d8b87562881"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.1829",
    "kind": "arxiv",
    "version": 2
  }
}