Pith Number

pith:T2RCYTJI

pith:2017:T2RCYTJINXQFMLLM5C7WWAOJSO

not attested not anchored not stored refs pending

Topological characterization of world cities

Cesar H. Comin, Filipi N. Silva, Guilherme S. Domingues, Luciano da F. Costa

arxiv:1709.08244 v2 · 2017-09-24 · 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{T2RCYTJINXQFMLLM5C7WWAOJSO}

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	2026-05-18T00:05:00.314660Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ea22c4d286de0562d6ce8bf6b01c993adbaa65b093410f45a0769395a577bbf

Aliases

arxiv: 1709.08244 · arxiv_version: 1709.08244v2 · doi: 10.48550/arxiv.1709.08244 · pith_short_12: T2RCYTJINXQF · pith_short_16: T2RCYTJINXQFMLLM · pith_short_8: T2RCYTJI

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/T2RCYTJINXQFMLLM5C7WWAOJSO \
  | 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: 9ea22c4d286de0562d6ce8bf6b01c993adbaa65b093410f45a0769395a577bbf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "58402ecd452ff75ee6d9fdc6a77cb613ef12a6514dce52c1b4eae744e1161d30",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2017-09-24T19:27:19Z",
    "title_canon_sha256": "570a1ec1be69d9d36592bbbcfe3b6d57eb21dd4a56a7f7bf2049fd0d49de15d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.08244",
    "kind": "arxiv",
    "version": 2
  }
}