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On the equality problem of finitely generated classes of exponentially-polynomial functions

  • Sergey S. Marchenkov EMAIL logo
Published/Copyright: June 18, 2023

Abstract

We consider the class EP of exponentially-polynomial functions which can be obtained by arbitrary superpositions of the constants 0, 1 and arithmetic operations of addition, multiplication, and powering. For this class, we solve the algorithmic equality problem of two functions that assume a finite number of values. Next, this class is restricted to the class PEP, in which the function xy is replaced by a sequence of functions { pix }, where p0, p1, … are all prime numbers. For the class PEP, the problem of membership of a function to a finitely generated class is effectively reduced to the equality problem of two functions. In turn, the last problem is effectively solved for the set of all one-place PEP-functions.


Originally published in Diskretnaya Matematika (2022) 34, №1, 64–75 (in Russian).


Acknowledgment

The author is grateful to the referee for valuable suggestions.

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Received: 2021-01-19
Published Online: 2023-06-18
Published in Print: 2023-06-27

© 2023 Walter de Gruyter GmbH, Berlin/Boston

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