Pith Number

pith:U3X4C44H

pith:2021:U3X4C44HM777AJSXVVLQZ2MGDY

not attested not anchored not stored refs pending

Efficient computational algorithms for approximate optimal designs

Hon Keung Tony Ng, Jiangtao Duan, Wei Gao, Yanyuan Ma

arxiv:2102.12676 v1 · 2021-02-25 · 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{U3X4C44HM777AJSXVVLQZ2MGDY}

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	2026-07-05T02:18:22.810428Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6efc1738767fff02657ad570ce9861e0570f687104aaed14552aa218d3c0161

Aliases

arxiv: 2102.12676 · arxiv_version: 2102.12676v1 · doi: 10.48550/arxiv.2102.12676 · pith_short_12: U3X4C44HM777 · pith_short_16: U3X4C44HM777AJSX · pith_short_8: U3X4C44H

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/U3X4C44HM777AJSXVVLQZ2MGDY \
  | 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: a6efc1738767fff02657ad570ce9861e0570f687104aaed14552aa218d3c0161

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8970f056250669e5d8d23cc5efa2d85e89a699d5682c6597ee16a9c17006e05c",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2021-02-25T04:21:31Z",
    "title_canon_sha256": "5b9a291a4c76f261bc6474bc84d77b79cefd28aa896f9f4ce7e8fc06ed2ec104"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.12676",
    "kind": "arxiv",
    "version": 1
  }
}