Pith Number

pith:K4EPZDRR

pith:2017:K4EPZDRR7CIIIJPK3D5SPXEBI4

not attested not anchored not stored refs pending

The Canary in the City: Indicator Groups as Predictors of Urban Change

Aike Alexander Steentoft, Ate Poorthuis, Bu-Sung Lee, Markus Schl\"apfer

arxiv:1712.08924 v1 · 2017-12-24 · physics.soc-ph · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K4EPZDRR7CIIIJPK3D5SPXEBI4}

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	2026-05-18T00:27:14.840364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5708fc8e31f8908425ead8fb27dc814739d60219ff50060dde375e3b1fef6076

Aliases

arxiv: 1712.08924 · arxiv_version: 1712.08924v1 · doi: 10.48550/arxiv.1712.08924 · pith_short_12: K4EPZDRR7CII · pith_short_16: K4EPZDRR7CIIIJPK · pith_short_8: K4EPZDRR

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/K4EPZDRR7CIIIJPK3D5SPXEBI4 \
  | 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: 5708fc8e31f8908425ead8fb27dc814739d60219ff50060dde375e3b1fef6076

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e94923e42cf10ae6175462e892d67db10c8ad50c190ad01f97f753600879df40",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2017-12-24T13:46:12Z",
    "title_canon_sha256": "31c0f1c577421e6dc4ebfd8e4c429a70aec19db247fd7780e8a5a5a9c974470e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.08924",
    "kind": "arxiv",
    "version": 1
  }
}