Sebastian Sitarz

Work place: Institute of Mathematics, University of Silesia, Poland

E-mail: ssitarz@math.us.edu.pl

Website:

Research Interests: Programming Language Theory, Comparative Programming Language Analysis

Biography

Sebastian Sitarz was born on March 19, 1975. He received his MS in Mathematics from University of Silesia (Poland) in 1999; PhD in Economics from University of Lodz in 2003 (Poland). Currently, he is working as a Lecturer in the Institute of Mathematics, the University of Silesia, Katowice (Poland), since 2003. His research areas include multi-objective linear programming, dynamic programming and their applications. His papers appeared in European Journal of Operational Research, Fuzzy Sets and Systems, Computers and Operations Research, Annals of Operations Research, Applied Mathematics and Computation and others.

Author Articles
Compromise Hypersphere for Multi-Criteria Dynamic Programming

By Sebastian Sitarz

DOI: https://doi.org/10.5815/ijieeb.2015.01.01, Pub. Date: 8 Jan. 2015

The paper considers multi-criteria dynamic decision process. We focus on the efficient realizations of the dynamic process which are characterized by non-dominated values of the multi-period criteria function. The aim of the paper is to use the compromise hypersphere method to rank the efficient realizations. The presented method allows us to take into account the risk aversion of the decision maker. Moreover, we apply the presented theory in the market model taken from microeconomic theory.

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Approaches to Sensitivity Analysis in MOLP

By Sebastian Sitarz

DOI: https://doi.org/10.5815/ijitcs.2014.03.07, Pub. Date: 8 Feb. 2014

The paper presents two approaches to the sensitivity analysis in multi-objective linear programming (MOLP). The first one is the tolerance approach and the other one is the standard sensitivity analysis. We consider the perturbation of the objective function coefficients. In the tolerance method we simultaneously change all of the objective function coefficients. In the standard sensitivity analysis we change one objective function coefficient without changing the others. In the numerical example we compare the results obtained by using these two different approaches.

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Rankings in Sport by Pairwise Comparison and League Table

By Sebastian Sitarz

DOI: https://doi.org/10.5815/ijmecs.2013.12.04, Pub. Date: 8 Dec. 2013

This article describes a method of creating rankings in sport (medal tables). First, the countries are pairwise compared by area of the feasible points for which they are better. These feasible points correspond to gold, silver and bronze medals. After pairwise comparison we use the method of league table to rank the countries.

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Reduced Multiplicative Tolerance Ranking and Applications

By Sebastian Sitarz

DOI: https://doi.org/10.5815/ijisa.2013.03.05, Pub. Date: 8 Feb. 2013

In this paper a reduced multiplicative tolerance - a measure of sensitivity analysis in multi-objective linear programming (MOLP) is presented. By using this new measure a method for ranking the set of efficient extreme solutions is proposed. The idea is to rank these solutions by values of the reduced tolerance. This approach can be applied to many MOLP problems, where sensitivity analysis is important for a decision maker. In the paper, applications of the presented methodology are shown in the market model and the transportation problem.

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Other Articles