Pith Number

pith:VRUGSDNE

pith:2016:VRUGSDNEQ752Z4VTHMNAHYEQMI

not attested not anchored not stored refs pending

Scaling Law of Urban Ride Sharing

Carlo Ratti, Giovanni Resta, Michael Szell, Oleguer Sagarra, Paolo Santi, Remi Tachet, Steven Strogatz

arxiv:1610.09921 v1 · 2016-10-27 · 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{VRUGSDNEQ752Z4VTHMNAHYEQMI}

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	2026-05-18T01:00:46.891985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac68690da487fbacf2b33b1a03e090622184769949834572c5029aadf4930c59

Aliases

arxiv: 1610.09921 · arxiv_version: 1610.09921v1 · doi: 10.48550/arxiv.1610.09921 · pith_short_12: VRUGSDNEQ752 · pith_short_16: VRUGSDNEQ752Z4VT · pith_short_8: VRUGSDNE

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/VRUGSDNEQ752Z4VTHMNAHYEQMI \
  | 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: ac68690da487fbacf2b33b1a03e090622184769949834572c5029aadf4930c59

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f990cbce72741e4fb79c619382290a6123c4a25f6e13220b3fa378d80a547b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2016-10-27T19:34:37Z",
    "title_canon_sha256": "ea8fec1416430b9f64c1c4c44bd06cb9dc1eb0345f6e5160dcafbf77d593bf83"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.09921",
    "kind": "arxiv",
    "version": 1
  }
}