Pith Number

pith:XPLEY7WV

pith:2014:XPLEY7WVT7E2Q5YCN662AFHM6O

not attested not anchored not stored refs pending

Large cities are less green

E. A. Oliveira, H. A. Makse, J. S. Andrade Jr.

arxiv:1401.7720 v2 · 2014-01-30 · 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{XPLEY7WVT7E2Q5YCN662AFHM6O}

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	2026-05-18T02:43:00.623230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbd64c7ed59fc9a877026fbda014ecf384b42e89fce98940252dcb539a4d5751

Aliases

arxiv: 1401.7720 · arxiv_version: 1401.7720v2 · doi: 10.48550/arxiv.1401.7720 · pith_short_12: XPLEY7WVT7E2 · pith_short_16: XPLEY7WVT7E2Q5YC · pith_short_8: XPLEY7WV

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/XPLEY7WVT7E2Q5YCN662AFHM6O \
  | 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: bbd64c7ed59fc9a877026fbda014ecf384b42e89fce98940252dcb539a4d5751

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43edee5b6fa3bcc7f83e0137bd9d9a73f41cde98b9e3f9153fb7089dcc6ce024",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2014-01-30T02:52:34Z",
    "title_canon_sha256": "9991677b29c7c663ebbd76a213ba973abf466635392e339f69fc0cf95bc1cf49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.7720",
    "kind": "arxiv",
    "version": 2
  }
}