Pith Number

pith:DBL7NVVW

pith:2013:DBL7NVVWGCALEEMC62K7EFIHIO

not attested not anchored not stored refs pending

Optimal A Priori Balance in the Design of Controlled Experiments

Nathan Kallus

arxiv:1312.0531 v4 · 2013-12-02 · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DBL7NVVWGCALEEMC62K7EFIHIO}

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	2026-05-18T00:39:07.401078Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1857f6d6b63080b21182f695f215074386299b3a6f60494f423bd8e3c11fba1e

Aliases

arxiv: 1312.0531 · arxiv_version: 1312.0531v4 · doi: 10.48550/arxiv.1312.0531 · pith_short_12: DBL7NVVWGCAL · pith_short_16: DBL7NVVWGCALEEMC · pith_short_8: DBL7NVVW

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/DBL7NVVWGCALEEMC62K7EFIHIO \
  | 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: 1857f6d6b63080b21182f695f215074386299b3a6f60494f423bd8e3c11fba1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "57fc49e796251a30f157ddccbb291c4ea3660092e01254a288d45ec81085fe41",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2013-12-02T17:49:23Z",
    "title_canon_sha256": "6171f624ba118f6a3872e1cee3f06ae70941831d374bc270a565f2f65a445c31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.0531",
    "kind": "arxiv",
    "version": 4
  }
}