Pith Number

pith:6MQYSYN6

pith:2019:6MQYSYN6KLTNEFLJEA5CB35PUP

not attested not anchored not stored refs pending

Optimal experimental designs for treatment contrasts in heteroscedastic models with covariates

Samuel Rosa

arxiv:1907.04044 v1 · 2019-07-09 · 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{6MQYSYN6KLTNEFLJEA5CB35PUP}

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	2026-05-17T23:41:05.879159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3218961be52e6d21569203a20efafa3dd61c31d85c94d26931baa0ffd9f74a8

Aliases

arxiv: 1907.04044 · arxiv_version: 1907.04044v1 · doi: 10.48550/arxiv.1907.04044 · pith_short_12: 6MQYSYN6KLTN · pith_short_16: 6MQYSYN6KLTNEFLJ · pith_short_8: 6MQYSYN6

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/6MQYSYN6KLTNEFLJEA5CB35PUP \
  | 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: f3218961be52e6d21569203a20efafa3dd61c31d85c94d26931baa0ffd9f74a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b3bdc5242c431f485021cb29830cdddf44d8476637f89932d066f2de56b6ce0d",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2019-07-09T08:42:32Z",
    "title_canon_sha256": "ae24b3ba9a7752b75fe45df85789e2bb6ba2999b1f0d148a0eaf23a99f9de067"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.04044",
    "kind": "arxiv",
    "version": 1
  }
}