Pith Number

pith:N4N25YI5

pith:2009:N4N25YI5QWCPL57H5QTOSTRQ3X

not attested not anchored not stored refs pending

A first-digit anomaly in the 2009 Iranian presidential election

Boudewijn F. Roukema

arxiv:0906.2789 v6 · 2009-06-16 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N4N25YI5QWCPL57H5QTOSTRQ3X}

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	2026-05-18T02:24:55.483563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f1baee11d8584f5f7e7ec26e94e30ddc45fa35d5fd4e391ab1b35053ff5b410

Aliases

arxiv: 0906.2789 · arxiv_version: 0906.2789v6 · doi: 10.48550/arxiv.0906.2789 · pith_short_12: N4N25YI5QWCP · pith_short_16: N4N25YI5QWCPL57H · pith_short_8: N4N25YI5

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/N4N25YI5QWCPL57H5QTOSTRQ3X \
  | 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: 6f1baee11d8584f5f7e7ec26e94e30ddc45fa35d5fd4e391ab1b35053ff5b410

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59e35e9163e9528909e108c3ba361118b240a47984306345e4665f62232aeeb7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2009-06-16T19:52:01Z",
    "title_canon_sha256": "fb7fb429a43812be923f2739f3b197251339d8eed5ecee407ec44c5eed1387ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.2789",
    "kind": "arxiv",
    "version": 6
  }
}