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Strongly Connected Steiner Subgraphs with small number of Steiner vertices
 Kemény, Tamás Dávid ; Feldmann, Andreas Emil (advisor) ; Suchý, Ondřej (referee)
Title: Strongly Connected Steiner Subgraphs with Small Number of Steiner Vertices Author: Tamás Dávid Kemény Department: Department of Applied Mathematics Supervisor: Dr. Andreas Emil Feldmann, Department of Applied Mathematics Abstract: Two well-established methods of dealing with hard optimization problems have been to develop approximation and parameterized algorithms. Recent results have shown that for some problems, it is only by combining these two approaches, into so-called pa- rameterized approximation algorithms, that we are able to efficiently find solutions that are of reasonable quality. This is the viewpoint from which we study the problem known as the Strongly Connected Steiner Subgraph problem, where a set of terminal vertices of an edge-weighted directed graph needs to be strongly-connected in the cheapest way possible. Keywords: Strongly Connected Steiner Subgraphs, Parameterized Algorithms, Approxi- mation Algorithms, Bidirected Graphs iii
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