Title
Approximate Query Complexity
Abstract
Let f : {0, 1}n → {0, 1}. Let μ be a product probability measure on {0, 1}n. For ε ≥ 0, we define Dε(f), the ε-approximate decision tree complexity of f, to be the minimum depth of a decision tree T with μ(T(x) ≠ f(x)) ≤ ε. For j = 0 or 1 and for δ ≥ 0, we define Cj,δ(f), the δ-approximate j-certificate complexity of f, to be the minimum certificate complexity of a set A ⊆ Ω with μ(AΔf−1(j)) ≤ ε. Note that if μ(x) 0 for all x then D0(f) = D(f) and Cj,0(f) = Cj(f) are the ordinary decision tree and j-certificate complexities of f, respectively. We extend the well-known result, D(f) ≤ C1(f)C0(f) [Blum and Impagliazzo 1987; Hartmanis and Hemachandra 1991; Tardos 1989], proving that for all ε 0 there exists a δ 0 and a constant K = K(ε, δ) 0 such that for all n, μ, f, Dε(f) ≤ K C1,δ(f)C0,δ (f). We also give a partial answer to a related question on query complexity raised by Tardos [1989]. We prove generalizations of these results to general product probability spaces.
Year
DOI
Venue
2011
10.1145/2003685.2003688
TOCT
Keywords
Field
DocType
query complexity,minimum certificate complexity,general product probability space,ordinary decision tree,decision tree,constant k,k c1,approximate query complexity,approximate j-certificate complexity,j-certificate complexity,approximate decision tree complexity,communication complexity,probability measure
Discrete mathematics,Combinatorics,Generalization,Probability measure,Communication complexity,Mathematics
Journal
Volume
Issue
Citations 
3
1
0
PageRank 
References 
Authors
0.34
7
1
Name
Order
Citations
PageRank
Clifford Smyth1246.91