Pith Number

pith:3HKMIG53

pith:2014:3HKMIG53HTSI7XDO2YU6KMXJB4

not attested not anchored not stored refs pending

Urban spatial-temporal activity structures: a New Approach to Inferring the Intra-urban Functional Regions via Social Media Check-In Data

Haifeng Li, Jing Gao, Min Deng, Shaowen Wang, Ye Zhi, Yu Liu

arxiv:1412.7253 v2 · 2014-12-23 · cs.SI · 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{3HKMIG53HTSI7XDO2YU6KMXJB4}

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	2026-05-18T02:29:01.112924Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d9d4c41bbb3ce48fdc6ed629e532e90f3712aee44b5becbc1be289d086ec263f

Aliases

arxiv: 1412.7253 · arxiv_version: 1412.7253v2 · doi: 10.48550/arxiv.1412.7253 · pith_short_12: 3HKMIG53HTSI · pith_short_16: 3HKMIG53HTSI7XDO · pith_short_8: 3HKMIG53

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/3HKMIG53HTSI7XDO2YU6KMXJB4 \
  | 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: d9d4c41bbb3ce48fdc6ed629e532e90f3712aee44b5becbc1be289d086ec263f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eeb8f9457dde7775dafb154f444c772b1011a70d219e5ffb6f47d26d1a2ab9f5",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2014-12-23T05:00:17Z",
    "title_canon_sha256": "f3acf5bb61591121d1fc867fa7038282e74e9cc1c82a179d35008677ad2865ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.7253",
    "kind": "arxiv",
    "version": 2
  }
}