SearcharxivSearch

arXiv · 1309.5862

On Regular Sets of Bounds and Determinism versus Nondeterminism

Abstract

This paper illustrates the richness of the concept of regular sets of time bounds and demonstrates its application to problems of computational complexity. There is a universe of bounds whose regular subsets allow to represent several time complexity classes of common interest and are linearly ordered with respect to the confinality relation which implies the inclusion between the corresponding complexity classes. By means of classical results of complexity theory, the separation of determinism from nondeterminism is possible for a variety of sets of bounds below $n\cdot\log^*(n)$. The system of all regular bound sets ordered by confinality allows the order-isomorphic embedding of, e.g., the ordered set of real numbers or the Cantor discontinuum.

Explore related subjects

Keep this discovery

BibTeXRIS

Armin Hemmerling. 2013-09-23. On Regular Sets of Bounds and Determinism versus Nondeterminism. https://arxiv.org/abs/1309.5862

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

The Computational Complexity of Holant Problems on 4-regular Graphs from the Stable Subgroup Sequence of $SL(2,\mathbb{C})$

The Holant framework provides a general setting for studying counting problems and includes graph homomorphisms (\#GH) and counting constraint satisfaction problems (\#CSP) as special cases. Over the past twenty years, a series of computational complexity dichotomies have been established for Holant problems, but the classification for complex-valued signatures is still open. The main obstacle is the case in which all signatures have even arity. In this paper, we establish a dichotomy for Holant problems with a complex-valued 4-ary signature, which is a key base case for the full classification of Holant problems. We present a new strategy by introducing Schur's theorem, the classification of finite subgroups of $\mathrm{SL}(2,\mathbb{C})$ and stable subgroup sequences into the proof. These new techniques are of independent interest.

cs.CC

Topology inside NC$^1$

We show that ACC$^0$ is precisely what can be computed with constant-width circuits of polynomial size and polylogarithmic genus. This extends a characterization given by Hansen, showing that planar constant-width circuits also characterize ACC$^0$. Thus polylogarithmic genus provides no additional computational power in this model. We consider other generalizations of planarity, including crossing number and thickness. We show that constant-width circuits of polynomial size and thickness two already suffice to capture all of NC$^1$.

cs.CC