Pith Number

pith:FZLCJ6VR

pith:2015:FZLCJ6VRLRFNDDD7UNCNLK7PLS

not attested not anchored not stored refs pending

Tracking Urban Activity Growth Globally with Big Location Data

Anastasios Noulas, Blake Shaw, Cecilia Mascolo, Matthew Daggitt

arxiv:1512.05819 v1 · 2015-12-17 · 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{FZLCJ6VRLRFNDDD7UNCNLK7PLS}

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	2026-05-18T01:24:06.179918Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e5624fab15c4ad18c7fa344d5abef5c8a04079dcdf482b770904d1018d58fad

Aliases

arxiv: 1512.05819 · arxiv_version: 1512.05819v1 · doi: 10.48550/arxiv.1512.05819 · pith_short_12: FZLCJ6VRLRFN · pith_short_16: FZLCJ6VRLRFNDDD7 · pith_short_8: FZLCJ6VR

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/FZLCJ6VRLRFNDDD7UNCNLK7PLS \
  | 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: 2e5624fab15c4ad18c7fa344d5abef5c8a04079dcdf482b770904d1018d58fad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c56e614e4cbdf666724554d436556f74185b289e20d3b93dd4dcc3e8dbe529c3",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2015-12-17T22:43:11Z",
    "title_canon_sha256": "494c349ebe22a0e71b618e5c2c759e54fe4ae67450a4578b656db900b6dd1219"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.05819",
    "kind": "arxiv",
    "version": 1
  }
}