TY - JOUR

T1 - Three properties of a discrete dynamical system in the space of infinitely differentiable functions

AU - Podlugniy, Ivan Andreevich

AU - Florinskiy, Alexandr Alekseevich

PY - 2019/1/1

Y1 - 2019/1/1

N2 - A nonlinear operator generated by a fixed function of two real variables is considered. The function is supposed to be smooth, the first argument is defined on a closed interval, the second one on the real line. We also assume that this function to be both strictly increasing and bilipshitz by the second argument. The operator acts on the space of all infinitely differentiable real functions defined on the same closed interval as the first argument of the fixed function, and assigns to any such a function the result of the substitution of its derivative instead of the second argument in the fixed function of two variables. For any trajectory of the discrete infinite dimensional dynamical system (which is chaotic in general case) generated by the operator we prove the following properties: a trajectory of the system is uniformly bounded iff it is pointwise bounded ; a trajectory is uniformly convergent with all its derivatives iff it is pointwise convergent; the least pointwise upper bound of the trajectory is also the greatest lower bound of an other trajectory of the system iff it is a fixed point of this system. The last statement gives serial characteristics of fixed points of the operator, which is not monotonous.

AB - A nonlinear operator generated by a fixed function of two real variables is considered. The function is supposed to be smooth, the first argument is defined on a closed interval, the second one on the real line. We also assume that this function to be both strictly increasing and bilipshitz by the second argument. The operator acts on the space of all infinitely differentiable real functions defined on the same closed interval as the first argument of the fixed function, and assigns to any such a function the result of the substitution of its derivative instead of the second argument in the fixed function of two variables. For any trajectory of the discrete infinite dimensional dynamical system (which is chaotic in general case) generated by the operator we prove the following properties: a trajectory of the system is uniformly bounded iff it is pointwise bounded ; a trajectory is uniformly convergent with all its derivatives iff it is pointwise convergent; the least pointwise upper bound of the trajectory is also the greatest lower bound of an other trajectory of the system iff it is a fixed point of this system. The last statement gives serial characteristics of fixed points of the operator, which is not monotonous.

KW - Fixed point

KW - Infinite dimensional dynamical system

KW - Nonlinear operator

KW - Pointwise bounded trajectory

KW - The least pointwise upper bound of the trajectory

KW - Uniformly bounded trajectory

UR - http://www.scopus.com/inward/record.url?scp=85063873696&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85063873696

VL - 2019

SP - 104

EP - 108

JO - ДИФФЕРЕНЦИАЛЬНЫЕ УРАВНЕНИЯ И ПРОЦЕССЫ УПРАВЛЕНИЯ

JF - ДИФФЕРЕНЦИАЛЬНЫЕ УРАВНЕНИЯ И ПРОЦЕССЫ УПРАВЛЕНИЯ

SN - 1817-2172

IS - 1

ER -