On one class of functions with complicated local structure that the solutions of infinite systems of functional equations (On one application of infinite systems of functional equations in the functions theory)

Abstract

The article is devoted to investigation of applications of infinite systems of functional equations for modeling of functions with complicated local structure, that are defined in terms of the nega-$\tilde{Q}$-representation. The infinite system of functional equations $$f\left({\hat{\phi }}^k(x)\right)={\tilde{\beta }}_{i_{k+1},k+1}+{\tilde{p}}_{i_{k+1},k+1}f\left({\hat{\phi }}^{k+1}(x)\right),$$ where $k=0,1,...$, $\hat{\phi }$ is a shift operator of the $\tilde{Q}$-expansion, $x={\Delta }_{i_1(x)i_2(x)...i_n(x)...}^{-\tilde{Q}}$, are investigated. It is proved, that the system has the unique solution in the class of determined and bounded on $[0;1]$ functions and continuity of the solution. His analytical presentation is founded. Conditions of its monotonicity and nonmonotonicity, differential, integral properties are studied. Conditions under which the solution of the functional equations system is a distribution function of random variable $\eta ={\Delta }_{{\xi }_1{\xi }_2...{\xi }_n...}^{\tilde{Q}}$ with independent $\tilde{Q}$-symbols are discovered. The results of the article was represented in Fourth all-Ukrainian Scientific Conference of Young Scientists on Mathematics and Physics, Kyiv, April 23-25, 2015 (https://www.researchgate.net/publication/301765100). The investigation was represented at the seminar on fractal analysis of Institute of Mathematics of the National Academy of Sciences of Ukraine on, October 30, 2014 (http://www.imath.kiev.ua/events/index.php?seminarId=21&archiv=1).

25 pages

References in corpus (5)

• On one fractal property of the Minkowski function
• Non-differentiable functions defined in terms of classical representations of real numbers
• On one class of functions with complicated local structure
• Representation of real numbers by the alternating Cantor series
• On one nearly everywhere continuous and nowhere differentiable function, that defined by automaton with finite memory

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• On certain maps defined by infinite sums
• Certain functions defined in terms of Cantor series
• On one class of modifications of the Salem function
• On one map between singular expansions