Pith Number

pith:Z2QOT3MU

pith:2015:Z2QOT3MU6SWEM6BBS23IVXSQM6

not attested not anchored not stored refs pending

Urban Morphometrics: Towards a Science of Urban Evolution

Alexios Prelorendjos, Emanuele Strano, Jacob Dibble, Mark Pagel, Mattia Zanella, Ombretta Romice, Sergio Porta

arxiv:1506.04875 v2 · 2015-06-16 · 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{Z2QOT3MU6SWEM6BBS23IVXSQM6}

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	2026-05-18T01:37:48.726916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cea0e9ed94f4ac46782196b68ade5067abc6361d428b685723526512e0b6d693

Aliases

arxiv: 1506.04875 · arxiv_version: 1506.04875v2 · doi: 10.48550/arxiv.1506.04875 · pith_short_12: Z2QOT3MU6SWE · pith_short_16: Z2QOT3MU6SWEM6BB · pith_short_8: Z2QOT3MU

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/Z2QOT3MU6SWEM6BBS23IVXSQM6 \
  | 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: cea0e9ed94f4ac46782196b68ade5067abc6361d428b685723526512e0b6d693

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "840e0c0ef8713373b6882b4d060045abaa585c8cacf053093f17de7ee712e5bc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2015-06-16T08:39:45Z",
    "title_canon_sha256": "f54269b8ca528fbc630e77c8900bde4d79a54db3a583cc9b981403391bb4eb58"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.04875",
    "kind": "arxiv",
    "version": 2
  }
}