Pith Number

pith:G2VTDV4C

pith:2018:G2VTDV4CKAAP3YJ5FFS54NJMQP

not attested not anchored not stored refs pending

Foursquare to The Rescue: Predicting Ambulance Calls Across Geographies

Anastasios Noulas, Bruno Gon\c{c}alves, Colin Moffatt, Desislava Hristova

arxiv:1801.09524 v3 · 2018-01-29 · physics.soc-ph · cs.CY · 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{G2VTDV4CKAAP3YJ5FFS54NJMQP}

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	2026-05-18T00:22:33.031780Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

36ab31d7825000fde13d2965de352c83ddb121ba9d6ebc2065ecbfce13f63043

Aliases

arxiv: 1801.09524 · arxiv_version: 1801.09524v3 · doi: 10.48550/arxiv.1801.09524 · pith_short_12: G2VTDV4CKAAP · pith_short_16: G2VTDV4CKAAP3YJ5 · pith_short_8: G2VTDV4C

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/G2VTDV4CKAAP3YJ5FFS54NJMQP \
  | 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: 36ab31d7825000fde13d2965de352c83ddb121ba9d6ebc2065ecbfce13f63043

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2088dc1490d9ac511a59d2f1944a60261141b3be6a93a5dc74c5a34d171ab23",
    "cross_cats_sorted": [
      "cs.CY",
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2018-01-29T14:27:51Z",
    "title_canon_sha256": "073bafd091a0d2245f29c601efb688b5c1049b8b27bbe09a5d57fb99e5f4dbfe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.09524",
    "kind": "arxiv",
    "version": 3
  }
}