Email this article On the set of continuously differentiable concave extensions of a Boolean function
- Authors: Barotov D.N.1, Barotov R.N.2
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Affiliations:
- Financial University under the Government of the Russian Federation
- Khujand State University named after academician Bobojon Gafurov
- Issue: Vol 30, No 149 (2025)
- Pages: 5-14
- Section: Articles
- URL: https://journals.rcsi.science/2686-9667/article/view/304166
- ID: 304166
Cite item
Abstract
This paper is devoted to the study of the existence of extremal elements of the set of continuously differentiable concave extensions to the set $[0,1]^n$ of an arbitrary Boolean function $f_{B}(x_1,\ldots,x_n)$, as well as finding the cardinality of the set of continuously differentiable concave extensions to $[0,1]^n$ of the Boolean function $f_{B}(x_1,\ldots,x_n).$ As a result of the study, it is proved that, firstly, for any Boolean function $f_{B}(x_1,\ldots,x_n)$ among its continuously differentiable concave extensions to $[0,1]^n$ there is no maximal element, secondly, if the Boolean function $f_{B}(x_1,\ldots,x_n)$ has more than one essential variable, then among its continuously differentiable concave extensions to $[0,1]^n$ there is no minimal element, and if the Boolean function is constant or has only one essential variable, then among its continuously differentiable concave extensions to $[0,1]^n$ there is a unique minimal element, the explicit form of which is given in the paper. It was also established that the cardinality of the set of continuously differentiable concave extensions to $[0,1]^n$ of an arbitrary Boolean function $f_{B}(x_1,\ldots,x_n)$ is equal to the continuum.
About the authors
Dostonjon N. Barotov
Financial University under the Government of the Russian Federation
Author for correspondence.
Email: DNBarotov@fa.ru
ORCID iD: 0000-0001-5047-7710
Senior Lecturer, Mathematics and Data Analysis Department
Russian Federation, 49/2 Leningradsky Prospekt, Moscow 125167, Russian FederationRuziboy N. Barotov
Khujand State University named after academician Bobojon Gafurov
Email: ruzmet.tj@mail.ru
ORCID iD: 0000-0003-3729-6143
Lecturer, Mathematical Analysis named after Professor A. Mukhsinov Department
Tajikistan, Mavlonbekova, Khujand 735700, Republic of TajikistanReferences
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