Results 1 to 10 of about 9,054,635 (310)

Topological Structure of Solution Sets of Fractional Control Delay Problem

open access: yesFractal and Fractional, 2023
This paper is concerned with the existence of a mild solution for the fractional delay control system. Firstly, we will study the control problem. Then, we will deal with the topological structure of the solution set consisting of the compactness and Rσ ...
Ahmed A. Al Ghafli   +4 more
doaj   +1 more source

Fuzzy Estimator Indirect Terminal Sliding Mode Control of Nonlinear Systems Based on Adaptive Continuous Barrier Function

open access: yesIEEE Access, 2022
In this paper, the theory of control is considered on nonlinear systems. A closed-loop controller with a strong idea has been introduced to track system states and guarantee asymptotically stability.
Mohammadreza Askari Sepestanaki   +5 more
doaj   +1 more source

SPMSM sensorless control of a new non-singular fast terminal sliding mode speed controller

open access: yesSystems Science & Control Engineering, 2021
In the SPMSM no-speed control system, the traditional SMC speed controlling led to a difference in adjustment speed, a large amount of overshoot and obvious chattering. In order to solve this problem, a new non-singular fast Terminal-SMC speed controller
Yuhao Zhu   +3 more
doaj   +1 more source

Types of Semi Continuous functions in Linguistic Neutrosophic Topological Spaces [PDF]

open access: yesNeutrosophic Sets and Systems, 2022
A number of types of semi-continuous linguistic neutrosophic functions are introduced in this paper. Furthermore, these types of functions are demonstrated with appropriate examples. Theorems and properties are discussed in great detail.
N. Gayathri, M. Helen
doaj   +1 more source

Double calculus [PDF]

open access: yesSurveys in Mathematics and its Applications, 2023
We present a streamlined, slightly modified version, in the two-variable situation, of a beautiful, but not so well known, theory by Bögel, already from the 1930s, on an alternative higher dimensional calculus of real functions, a double calculus, which ...
Patrik Lundström
doaj  

On Homomorphisms from Cn to Cm

open access: yesRatio Mathematica, 2020
In this paper, using elementary algebra and analysis, we characterize and compute all continuous homomorphism from Cn to Cm. Also we prove that the cardinality of the set of all non-continous group homomorphism from Cn to Cm is at least the cardinality ...
Sivadasan Vinod   +1 more
doaj   +1 more source

A note on approximation of continuous functions on normed spaces

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2020
Let $X$ be a real separable normed space $X$ admitting a separating polynomial. We prove that each continuous function from a subset $A$ of $X$ to a real Banach space can be uniformly approximated by restrictions to $A$ of functions, which are analytic ...
M.A. Mytrofanov, A.V. Ravsky
doaj   +1 more source

Generalization of existence theorems of root and its application

open access: yes上海师范大学学报. 自然科学版, 2021
It is well known that the existence of roots theorem for continuous functions not only is important in Mathematical Analysis, but also has wide applications.
CHEN Huiqin   +3 more
doaj   +1 more source

On some properties of the superposition operator on topological manifolds [PDF]

open access: yesOpuscula Mathematica, 2010
In this paper the superposition operator in the space of vector-valued, bounded and continuous functions on a topological manifold is considered. The acting conditions and criteria of continuity and compactness are established.
Janusz Dronka
doaj   +1 more source

Discontinuous Steklov operator and approximate polynomial splines [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика
For a continuous function specified on a uniform grid of the segment [0,1], a method for constructing approximation polynomial splines is presented.
Khromova, Galina Vladimirovna
doaj   +1 more source

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