On Fixed-Parameter Tractability and Approximability of NP Optimization Problems
نویسندگان
چکیده
منابع مشابه
Approximability and Fixed-Parameter Tractability for the Exemplar Genomic Distance Problems
In this paper, we present a survey of the approximability and fixed-parameter tractability results for some Exemplar Genomic Distance problems. We mainly focus on three problems: the exemplar breakpoint distance problem and its complement (i.e., the exemplar non-breaking similarity or the exemplar adjacency number problem), and the maximal strip recovery (MSR) problem. The following results hol...
متن کاملFixed Parameter Tractability and Treewidth 14 . 1 Fixed Parameter Tractability
One of the ways to cope with hard problems in practice is to realized that problem instances may be associated with some “parameters” related to their complexity. If the parameter of an instance is small, we might have some hope in finding a polynomial time solution to that instance. This idea has been investigated in the 1990’s by Downian and Fellowes in their work on fixed parameter tractabil...
متن کاملOn the fixed-parameter tractability of parameterized model-checking problems
In this note, we show, through the use of examples, how generic results for proving fixed-parameter tractability which apply to restricted classes of structures can sometimes be more widely applied.
متن کاملOn Fixed-Parameter Tractability of Some Routing Problems
Disjoint Paths is the problem of finding paths between given pairs of terminals in a graph such that no vertices are shared between paths. We analyze fixed-parameter tractability of several new Disjoint Paths-like routing problems motivated by congestion control in computer networks. In one model we are interested in finding paths between k pairs of terminals such that the first edge of each pa...
متن کاملFixed parameter approximability and inapproximability
NP -hard problems are believed to be intractable. This is the widely believe assumption that P 6= NP . In parameterized complexity the input is refined to (I, k) with k a parameter depending on the input and the goal is to find an exact algorithm that runs in time f(k) ·nO(1) for the problem so that f is an arbitrary function. In this draft we only focus on k that is the size of the optimum sol...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Computer and System Sciences
سال: 1997
ISSN: 0022-0000
DOI: 10.1006/jcss.1997.1490