Pith Number

pith:6HE5OFLZ

pith:2015:6HE5OFLZUBNJONZHKFBI5A7WRM

not attested not anchored not stored refs pending

A diffusion-based approach to obtaining the borders of urban areas

Cesar Henrique Comin, Filipi Nascimento Silva, Luciano da Fontoura Costa

arxiv:1510.06326 v2 · 2015-10-21 · 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{6HE5OFLZUBNJONZHKFBI5A7WRM}

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	2026-05-18T01:10:38.301801Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1c9d71579a05a97372751428e83f68b3e88f8b780359e26c5aa3b255682200b

Aliases

arxiv: 1510.06326 · arxiv_version: 1510.06326v2 · doi: 10.48550/arxiv.1510.06326 · pith_short_12: 6HE5OFLZUBNJ · pith_short_16: 6HE5OFLZUBNJONZH · pith_short_8: 6HE5OFLZ

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/6HE5OFLZUBNJONZHKFBI5A7WRM \
  | 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: f1c9d71579a05a97372751428e83f68b3e88f8b780359e26c5aa3b255682200b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e3e7b82a7c777905dc9e3623ac5c1224cd810b340ed7b5c30826ac8328e1c99",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2015-10-21T16:25:52Z",
    "title_canon_sha256": "4c64cc6885efa39e24b1a6400806f410b138c0fef40e6b3f52c7e3f950b1abbe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.06326",
    "kind": "arxiv",
    "version": 2
  }
}