Pith Number

pith:SRH4E7E5

pith:2026:SRH4E7E5Q6ATTJWOBO5J6WMAII

not attested not anchored not stored refs pending

Observing rurality of a geographical area from road graph geometry -- a qualitative study

Rami Luisto

arxiv:2601.12006 v2 · 2026-01-17 · physics.soc-ph · math.HO · math.MG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SRH4E7E5Q6ATTJWOBO5J6WMAII}

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	2026-05-20T01:05:06.079744Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

944fc27c9d878139a6ce0bba9f5980421e7b816eab03fd42a98e00e18af5f1c6

Aliases

arxiv: 2601.12006 · arxiv_version: 2601.12006v2 · doi: 10.48550/arxiv.2601.12006 · pith_short_12: SRH4E7E5Q6AT · pith_short_16: SRH4E7E5Q6ATTJWO · pith_short_8: SRH4E7E5

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/SRH4E7E5Q6ATTJWOBO5J6WMAII \
  | 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: 944fc27c9d878139a6ce0bba9f5980421e7b816eab03fd42a98e00e18af5f1c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ea02321ee6bf238e53f66d0c2fb37b79a75d321410477cde9230afc179345eb",
    "cross_cats_sorted": [
      "math.HO",
      "math.MG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2026-01-17T10:56:34Z",
    "title_canon_sha256": "f24d07fa40d305d32bc5fa2852ad4d958a150fad60fc672b83e9f2c6ad7fa109"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.12006",
    "kind": "arxiv",
    "version": 2
  }
}