# Tuesday, April 18, p.m. Room 50

### Symposium B:
Mathematical Methods in Cybernetics and Systems Theory

*Y. Rav, France, and J.Scharinger, Austria*

- 14:00-14:30
- Quotients of Noncommutative Polynomials in Nonlinear Control Systems

*M. Halas, Slovak University of Technology, Bratislava, Slovakia*
- 14:30-15:00
- Optimal Control of a Hybrid Coupled Tanks System

*T. Hirmajer, M. Fikar, Slovak University of Technology, Bratislava,
Slovakia*
- 15:00-15:30
- The Gateways Location and Capacity Assignment Problem in Hierarchical WANs: An Approximate Algorithm and Computational Results

*P. Ryba, A. Kasprzak, Wroclaw University of Technology, Poland*
- 15:30-16:00
- Coffee Break
- 16:00-16:30
- Probability of Intuitionistic Fuzzy Events with Help of Modal Operators

*T. Gerstenkorn, J. Manko, University of Trade, Lodz, Poland*
- 16:30-17:00
- Causality and Anticipation in Stochastic Differential Systems

*Y. Endow, Chuo University, Tokyo, Japan*