Pith Number

pith:OW5OYS3D

pith:2020:OW5OYS3DRYAAPFU7PU6Q7EOBQX

not attested not anchored not stored refs pending

Modern cities emerge as 'super-cells' where enclosed industrial systems are hotspots of goods and services

Changhui Peng, Feng Mao, Guofu Yang, Jie Chang, Kaixuan Pan, Laura A. Meyerson, Mikko P. Heino, Xing Fan, Ying Ge, Yong Min, Yuan Ren, YuanYuan Du, Zelong Qu, Zhaoping Wu

arxiv:2003.01881 v1 · 2020-03-04 · 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{OW5OYS3DRYAAPFU7PU6Q7EOBQX}

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	2026-07-05T00:45:36.910610Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75baec4b638e0007969f7d3d0f91c185e05f54b114c288fe47e717f567d960c1

Aliases

arxiv: 2003.01881 · arxiv_version: 2003.01881v1 · doi: 10.48550/arxiv.2003.01881 · pith_short_12: OW5OYS3DRYAA · pith_short_16: OW5OYS3DRYAAPFU7 · pith_short_8: OW5OYS3D

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/OW5OYS3DRYAAPFU7PU6Q7EOBQX \
  | 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: 75baec4b638e0007969f7d3d0f91c185e05f54b114c288fe47e717f567d960c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25d95fc9a2d2c5db6ecbfa4d06efdc0406aa705c5bf6ad4760533f4388e9a8ec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2020-03-04T04:01:57Z",
    "title_canon_sha256": "850b5554315d842f5949a626d1c201d69d25087e48aa2f3817412f6ad179b98d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.01881",
    "kind": "arxiv",
    "version": 1
  }
}