State Transition Table of a Finite Automata: a Science Project for High School Students

  • Boris F. Melnikov Shenzhen MSU– BIT University, No. 1, International University Park Road, Dayun New Town, Longgang District, Shenzhen, PRC, 517182, Guangdong Province, Shenzhen, Chin
  • Mikhail E. Abramyan Southern Federal University, 105/42, Bolshaya Sadovaya str., 344006, Rostov-on-Don, Russia
  • Elena A. Melnikova Russian State Social University, 4, build. 1, Wilhelm Pieck street, 129226 Moscow, Russia
Keywords: optimization problem, finite automaton, heuristic algorithm, the first step in science

Abstract

Since the late 1960s, the problem of minimizing non-deterministic finite automata has been studied. In practical programs for large dimensions, obtaining an exact answer usually takes an unacceptably long time. In this regard, we are interested in, among others, heuristic algorithms for solving the problem, i.e. in algorithms that ``do not promise anything'', which, however, in practice in most cases, they give a solution that is close to optimal for an acceptable working time.
The project proposed for schoolchildren is aimed at a partial solution of one of the auxiliary tasks arising in the mentioned optimization problem. To do this, we define in a special way the equivalence relation on the set of tables of a given size M x N filled with elements 0 and 1. Obtaining the number of nonequivalent tables of dimension 8 x 10 will be a serious step on the way to proving the fact that the example of the ``bad'' automaton described in 1970 (the so-called Waterloo automaton) is the minimal possible example, not having ``lesser'' analogues.
To solve the problem, we first propose a bad algorithm, which consists in a simple enumeration of matrices. This algorithm works well on matrices of small dimensions, but, as usual in such situations, it works unacceptably long when moving to large dimensions. To reduce the operating time of the algorithm, we offer several heuristics, and present the results of the work of different versions of the program. The goal of the project is the creation of new heuristics, an even greater increase in the operating time of the program and, if possible, obtaining an answer (the number of tables) for the dimension 8 x 10.
For the majority of variants of the algorithm described in the paper, we present the implementation in C# using the principles of the object-oriented programming. We assume that further work on the project will consist in further modification of the programs we have provided.

Author Biographies

Boris F. Melnikov, Shenzhen MSU– BIT University, No. 1, International University Park Road, Dayun New Town, Longgang District, Shenzhen, PRC, 517182, Guangdong Province, Shenzhen, Chin

Melnikov Boris Feliksovich, Professor, Shenzhen MSU– BIT University, Shenzhen, China

Mikhail E. Abramyan, Southern Federal University, 105/42, Bolshaya Sadovaya str., 344006, Rostov-on-Don, Russia

Abramyan Mikhail Eduardovich, Associated Professor, Department of Algebra and Discrete Mathematics, Southern Federal University, Rostov-on-Don, Russia

Elena A. Melnikova, Russian State Social University, 4, build. 1, Wilhelm Pieck street, 129226 Moscow, Russia

Melnikova Elena Anatolyevna, Russian State Social University, Moscow,
Russia, Associated Professor.

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Published
2019-06-28
How to Cite
Melnikov, B. F., Abramyan, M. E., & Melnikova, E. A. (2019). State Transition Table of a Finite Automata: a Science Project for High School Students. Computer Tools in Education, (2), 87-107. https://doi.org/10.32603/2071-2340-2019-2-87-107
Section
Computers in the teaching process