Results 1 to 10 of about 743,734 (173)
Fixed point theorems on a closed ball [PDF]
Mathematica Moravica, 2021 The aim of the paper is to obtain some fixed point theorems for extended (ϕ, F)-weak type contraction on a closed ball in metric spaces. Our results generalize some recently established results.
Chandra Singh Manish +2 more
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On polynomial images of a closed ball [PDF]
Journal of the Mathematical Society of Japan, 2023 In this work we approach the problem of determining which (compact) semialgebraic subsets of ${\mathbb R}^n$ are images under polynomial maps $f:{\mathbb R}^m\to{\mathbb R}^n$ of the closed unit ball $\overline{\mathcal B}_m$ centered at the origin of some Euclidean space ${\mathbb R}^m$ and that of estimating (when possible) which is the smallest $m ...
Fernando Galván, José Francisco +1 more
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A new analytical control strategy for a magnetic suspension system under initial position dispersions [PDF]
FME Transactions, 2021 A nonlinear magnetic suspension system is considered in this paper. A novel online algorithm based on analytical approach is presented to stabilize the suspended mass. The new algorithm employs a single analytical function to create the ball position and
Al-Bakri Fawaz F. +2 more
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Adaptive model Predictive control for a magnetic suspension system under initial position dispersions and voltage disturbances [PDF]
FME Transactions, 2022 A nonlinear magnetic suspension system consisting of a mechanical motion and electromagnetic circuit is considered in this paper. An online algorithm that is used to stabilize the suspended mass targeting the desired ball position, ball velocity and coil
Al-Bakri Fawaz F. +2 more
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Quaestiones Mathematicae, 2021 Inspired by circular complex interval arithmetic, an arithmetic for closed balls in Rn is pursued. In this sense, the properties of certain operations on closed balls in Rn, some of which related either to the Hadamard product of vectors or to the 2-fold vector cross product when n є {3, 7}, are studied.
Beites, P. D. +2 more
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Existence of Fuzzy Fixed Points and Common Fuzzy Fixed Points for
Mathematics, 2023 This article contains results of the existence of fuzzy fixed points of fuzzy mappings that satisfy certain contraction conditions using the platform of partial b-metric spaces. Some non-trivial examples are provided to authenticate the main results. The
Dur-e-Shehwar Sagheer +4 more
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Mathematics, 2023 The aim of the present research article is to solve the system of linear equations using common fixed point theorems in the context of bicomplex valued metric spaces.
Amnah Essa Shammaky, Jamshaid Ahmad
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Mathematics, 2022 In this paper, we introduce a generalized Δ-implicit locally contractive condition and give some examples to support it and show its significance in fixed point theory.
Tahair Rasham +3 more
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Multiplication of closed balls in $\mathbb{C}^n$
Turkish Journal of Mathematics, 2023 Summary: Motivated by circular complex interval arithmetic, some operations on closed balls in \(\mathbb{C}^n\) are considered. Essentially, the properties of possible multiplications for closed balls in \(\mathbb{C}^n\), related either to the Hadamard product of vectors or to the 2-fold vector cross product when \(n\in\{3, 7\}\), are studied.
Beites, Patrícia Damas +2 more
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Nanomaterials, 2023 Mechanical ball milling is a prevalent technology for material preparation and also serves as a post-treatment method to modify electrode materials, thus enhancing electrochemical performances.
Xiaojie Wang +7 more
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