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Global behaviour and periodicities of some fractional recursive sequences

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In this paper, we obtain the expression and form of the solutions of the following recursive sequences xn+1 = xn−2xn−7 / xn−4(±1 ± xn−2xn−7) , n = 0, 1, ..., where the initial conditions x−7, x−6, x−5, x−4, x−3, x−2, x−1, x0 are arbitrary positive real numbers. We studied the equilibrium points of the given equation. Some qualitative properties such as the global stability, and the periodic character of the solutions in each case have been studied. We found expression and form of solution and presented some numerical examples by using random initial values in each case. Some figures have been given to explain the behavior of the obtained solutions by using MATLAB 6.5 to confirm the obtained results.

Abstract

In this paper, we obtain the expression and form of the solutions of the following recursive sequences xn+1 = xn−2xn−7 / xn−4(±1 ± xn−2xn−7) , n = 0, 1, ..., where the initial conditions x−7, x−6, x−5, x−4, x−3, x−2, x−1, x0 are arbitrary positive real numbers. We studied the equilibrium points of the given equation. Some qualitative properties such as the global stability, and the periodic character of the solutions in each case have been studied. We found expression and form of solution and presented some numerical examples by using random initial values in each case. Some figures have been given to explain the behavior of the obtained solutions by using MATLAB 6.5 to confirm the obtained results.

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