Pith Number

pith:V3D6XHU3

pith:2018:V3D6XHU3G6PWL3TCVUPCK4KYWK

not attested not anchored not stored refs pending

Measuring Accessibility using Gravity and Radiation Models

Alan Wilson, Duccio Piovani, Elsa Arcaute, Gabriela Uchoa, Michael Batty

arxiv:1802.06421 v1 · 2018-02-18 · 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{V3D6XHU3G6PWL3TCVUPCK4KYWK}

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	2026-05-18T00:23:03.341799Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aec7eb9e9b379f65ee62ad1e257158b285b13651a9757b11edf82ff4881dc2a1

Aliases

arxiv: 1802.06421 · arxiv_version: 1802.06421v1 · doi: 10.48550/arxiv.1802.06421 · pith_short_12: V3D6XHU3G6PW · pith_short_16: V3D6XHU3G6PWL3TC · pith_short_8: V3D6XHU3

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/V3D6XHU3G6PWL3TCVUPCK4KYWK \
  | 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: aec7eb9e9b379f65ee62ad1e257158b285b13651a9757b11edf82ff4881dc2a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef1a3dc9aa5e3701157fba80a176355842bca80676e0833aa3a4e0d4ed3ca96d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2018-02-18T18:47:33Z",
    "title_canon_sha256": "32c84585e4c90ec60ea7131736e5e3b3309cb007d58f8ff727eab0975a95957e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06421",
    "kind": "arxiv",
    "version": 1
  }
}