Pith Number

pith:WMNOHBSK

pith:2015:WMNOHBSKVTLHYSXJK7DHLQ54BI

not attested not anchored not stored refs pending

How Many Political Parties Should Brazil Have? A Data-driven Method to Assess and Reduce Fragmentation in Multi-Party Political Systems

Pedro O.S. Vaz de Melo

arxiv:1509.08465 v2 · 2015-09-28 · cs.SI · cs.CY · cs.MA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WMNOHBSKVTLHYSXJK7DHLQ54BI}

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	2026-05-18T01:20:42.816973Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b31ae3864aacd67c4ae957c675c3bc0a0ae38b9b366771ceecc69ce895338f53

Aliases

arxiv: 1509.08465 · arxiv_version: 1509.08465v2 · doi: 10.48550/arxiv.1509.08465 · pith_short_12: WMNOHBSKVTLH · pith_short_16: WMNOHBSKVTLHYSXJ · pith_short_8: WMNOHBSK

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/WMNOHBSKVTLHYSXJK7DHLQ54BI \
  | 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: b31ae3864aacd67c4ae957c675c3bc0a0ae38b9b366771ceecc69ce895338f53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2245c1669856d5d40ec321cb319d39042b0520b68f5dfe6e1cf6e5577820eb6e",
    "cross_cats_sorted": [
      "cs.CY",
      "cs.MA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2015-09-28T20:10:47Z",
    "title_canon_sha256": "781135d1ffef9fc17999b1f88751f612e51cb675d56b82c0ecccc302af8d71ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.08465",
    "kind": "arxiv",
    "version": 2
  }
}