Pith Number

pith:KN34TG3N

pith:2017:KN34TG3NINMPANUIO6J774IWUI

not attested not anchored not stored refs pending

The light pollution as a surrogate for urban population of the US cities

Erneson A. Oliveira, Felipe G. Operti, Humberto A. Carmona, Javam C. Machado, Jos\'e S. Andrade Jr

arxiv:1706.05139 v1 · 2017-06-16 · 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{KN34TG3NINMPANUIO6J774IWUI}

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	2026-05-18T00:25:57.215835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5377c99b6d4358f036887793fff116a2374d9ea827bbb178d4dd810fab4acab1

Aliases

arxiv: 1706.05139 · arxiv_version: 1706.05139v1 · doi: 10.48550/arxiv.1706.05139 · pith_short_12: KN34TG3NINMP · pith_short_16: KN34TG3NINMPANUI · pith_short_8: KN34TG3N

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/KN34TG3NINMPANUIO6J774IWUI \
  | 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: 5377c99b6d4358f036887793fff116a2374d9ea827bbb178d4dd810fab4acab1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bba5855a5da4e7e5b9afe733f6a43823217bf569b3f95b703083e5906fb9f6ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2017-06-16T03:30:18Z",
    "title_canon_sha256": "fe213ec4703b100dbc5e7dc2377914ca1982f5cd9ed5448811902c6f6bf18c07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.05139",
    "kind": "arxiv",
    "version": 1
  }
}