Pith Number

pith:MWXXPYVF

pith:2026:MWXXPYVFV554JG7DRBCUI27BEL

not attested not anchored not stored refs pending

TCARD: Nearly Balanced Two-Level Designs with Treatment Cardinality Constraints with an Application to LLM Prompt Engineering

Kexin Xie, Ryan Lekivetz, Xinwei Deng

arxiv:2605.21408 v1 · 2026-05-20 · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MWXXPYVFV554JG7DRBCUI27BEL}

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	2026-05-21T02:05:33.323199Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

65af77e2a5af7bc49be38845446be122eb1ec22f123904abf81efa609be97e50

Aliases

arxiv: 2605.21408 · arxiv_version: 2605.21408v1 · doi: 10.48550/arxiv.2605.21408 · pith_short_12: MWXXPYVFV554 · pith_short_16: MWXXPYVFV554JG7D · pith_short_8: MWXXPYVF

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/MWXXPYVFV554JG7DRBCUI27BEL \
  | 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: 65af77e2a5af7bc49be38845446be122eb1ec22f123904abf81efa609be97e50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "723e184a0088232629ce3d8e54a97a61d26656e1f56f83f8954bd5fe590ee7f8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2026-05-20T17:06:34Z",
    "title_canon_sha256": "639a0716aa099b200648fa71f9bb88c9accaf295614ab3704c167b45cb4f8e7c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.21408",
    "kind": "arxiv",
    "version": 1
  }
}