Pith Number

pith:5CZNQMQW

pith:2011:5CZNQMQWLOWU5FQDLGNUU5EKWG

not attested not anchored not stored refs pending

Interplay between telecommunications and face-to-face interactions - a study using mobile phone data

Carlo Ratti, Francesco Calabrese, Vincent D. Blondel, Zbigniew Smoreda

arxiv:1101.4505 v2 · 2011-01-24 · physics.soc-ph · 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{5CZNQMQWLOWU5FQDLGNUU5EKWG}

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	2026-05-18T04:17:13.503832Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8b2d832165bad4e9603599b4a748ab1b47c77037936ca4fb436651d62dcb1f3

Aliases

arxiv: 1101.4505 · arxiv_version: 1101.4505v2 · doi: 10.48550/arxiv.1101.4505 · pith_short_12: 5CZNQMQWLOWU · pith_short_16: 5CZNQMQWLOWU5FQD · pith_short_8: 5CZNQMQW

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/5CZNQMQWLOWU5FQDLGNUU5EKWG \
  | 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: e8b2d832165bad4e9603599b4a748ab1b47c77037936ca4fb436651d62dcb1f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5df2c4b3ca77aa06d6b9dd435cefcbf546b4a770f00bb50016167ad2394da24b",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2011-01-24T11:36:04Z",
    "title_canon_sha256": "45732d55731d0270d1672f1755424ef445aa46b646fa4d6eae139fcbf3eb4001"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4505",
    "kind": "arxiv",
    "version": 2
  }
}