Pith Number

pith:ZRK4KSCY

pith:2018:ZRK4KSCYUELRRCJNSC6PZULVJR

not attested not anchored not stored refs pending

The spatial organization of the population density in cities

Marc Barthelemy, Valerio Volpati

arxiv:1804.00855 v1 · 2018-04-03 · 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{ZRK4KSCYUELRRCJNSC6PZULVJR}

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.

Cited by

2 papers in Pith

The parenthood effect in urban mobility

Scaling intra-urban climate fluctuations

Receipt and verification

First computed	2026-05-18T00:19:31.954649Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc55c54858a11718892d90bcfcd1754c7f59eeb637ddacc55e3ddc9f4335f63c

Aliases

arxiv: 1804.00855 · arxiv_version: 1804.00855v1 · doi: 10.48550/arxiv.1804.00855 · pith_short_12: ZRK4KSCYUELR · pith_short_16: ZRK4KSCYUELRRCJN · pith_short_8: ZRK4KSCY

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/ZRK4KSCYUELRRCJNSC6PZULVJR \
  | 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: cc55c54858a11718892d90bcfcd1754c7f59eeb637ddacc55e3ddc9f4335f63c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07bc037bdf47a758fe8c73740efe290016d3f59db29c54af9aa6a4210f6d162f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2018-04-03T07:33:30Z",
    "title_canon_sha256": "9fc0a5b6e130434d4f1666a5379654666101ba19ef20375c0b532d70603e7efb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.00855",
    "kind": "arxiv",
    "version": 1
  }
}