Pith Number

pith:UHC7DDJS

pith:2015:UHC7DDJSJZPI3P76CE6TEDV553

not attested not anchored not stored refs pending

Urban Scaling of Cities in the Netherlands

Anthony F.J. van Raan, Gerwin van der Meulen, Willem Goedhart

arxiv:1503.04795 v2 · 2015-03-14 · physics.soc-ph · nlin.AO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UHC7DDJSJZPI3P76CE6TEDV553}

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	2026-05-18T01:20:46.828704Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1c5f18d324e5e8dbffe113d320ebdeee8501e6b16cf0f80e0c13d2bb8a6dc3f

Aliases

arxiv: 1503.04795 · arxiv_version: 1503.04795v2 · doi: 10.48550/arxiv.1503.04795 · pith_short_12: UHC7DDJSJZPI · pith_short_16: UHC7DDJSJZPI3P76 · pith_short_8: UHC7DDJS

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/UHC7DDJSJZPI3P76CE6TEDV553 \
  | 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: a1c5f18d324e5e8dbffe113d320ebdeee8501e6b16cf0f80e0c13d2bb8a6dc3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0de51bdbd4f0e03436974d877faedb8667cc214622c987bda232db310b287001",
    "cross_cats_sorted": [
      "nlin.AO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2015-03-14T09:36:09Z",
    "title_canon_sha256": "2b5b00d54a25b74c10702a41784e07b76655f8103c5fb77c25380bacfd1d79d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.04795",
    "kind": "arxiv",
    "version": 2
  }
}