dorsal/arxiv
View SchemaMonte Carlo to Las Vegas for Recursively Composed Functions
| Authors | Bandar Al-Dhalaan, Shalev Ben-David |
|---|---|
| Categories | |
| ArXiv ID | 2601.08073vv1 |
| URL | https://arxiv.org/abs/2601.08073 |
| License | http://creativecommons.org/licenses/by-sa/4.0/ |
Abstract
For a (possibly partial) Boolean function $f\colon\{0,1\}^n\to\{0,1\}$ as well as a query complexity measure $M$ which maps Boolean functions to real numbers, define the composition limit of $M$ on $f$ by $M^*(f)=\lim_{k\to\infty} M(f^k)^{1/k}$. We study the composition limits of general measures in query complexity. We show this limit converges under reasonable assumptions about the measure. We then give a surprising result regarding the composition limit of randomized query complexity: we show $R_0^*(f)=\max\{R^*(f),C^*(f)\}$. Among other things, this implies that any bounded-error randomized algorithm for recursive 3-majority can be turned into a zero-error randomized algorithm for the same task. Our result extends also to quantum algorithms: on recursively composed functions, a bounded-error quantum algorithm can be converted into a quantum algorithm that finds a certificate with high probability. Along the way, we prove various combinatorial properties of measures and composition limits.
{
"annotation_id": "582055cc-c6f8-463a-8366-7d4bfc66222f",
"date_created": "2026-02-17T05:53:16.066000Z",
"date_modified": "2026-02-17T05:53:16.066000Z",
"file_hash": "f2103f85a400e0d650ae819707e4705efd74eca32ccd593590fe58a53a04d1b8",
"private": false,
"record": {
"abstract": "For a (possibly partial) Boolean function $f\\colon\\{0,1\\}^n\\to\\{0,1\\}$ as well as a query complexity measure $M$ which maps Boolean functions to real numbers, define the composition limit of $M$ on $f$ by $M^*(f)=\\lim_{k\\to\\infty} M(f^k)^{1/k}$.\n We study the composition limits of general measures in query complexity. We show this limit converges under reasonable assumptions about the measure. We then give a surprising result regarding the composition limit of randomized query complexity: we show $R_0^*(f)=\\max\\{R^*(f),C^*(f)\\}$. Among other things, this implies that any bounded-error randomized algorithm for recursive 3-majority can be turned into a zero-error randomized algorithm for the same task. Our result extends also to quantum algorithms: on recursively composed functions, a bounded-error quantum algorithm can be converted into a quantum algorithm that finds a certificate with high probability.\n Along the way, we prove various combinatorial properties of measures and composition limits.",
"arxiv_id": "2601.08073",
"authors": [
"Bandar Al-Dhalaan",
"Shalev Ben-David"
],
"categories": [
"cs.CC",
"quant-ph"
],
"license": "http://creativecommons.org/licenses/by-sa/4.0/",
"title": "Monte Carlo to Las Vegas for Recursively Composed Functions",
"url": "https://arxiv.org/abs/2601.08073",
"version": "v1"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "95ea95c4-ea85-483d-a504-e6a7669e1c9c",
"id": "arXiv Dataset",
"type": "Model",
"variant": "snapshot-2026-01-17",
"version": "0.1.0"
},
"user_id": 1000002
}