Results 11 to 20 of about 46,313 (294)
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 ...
JOSÉ F Fernando, CARLOS Ueno
exaly +5 more sources
Open Mathematics, 2019 The purpose of this paper is to find common fixed point results for two families of multivalued mappings fulfilling generalized rational type A–dominated contractive conditions on a closed ball in complete dislocated b-metric spaces. Some new fixed point
Rasham Tahair, Shoaib Abdullah
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Analysis of the efficiency of the grinding process in closed circuit ball mills
MATEC Web of Conferences, 2016 Ball mills for fine grinding cement clinker and additives are widely used around the world. To improve the efficiency of a ball grinding the ball mills are transferred in closed circuit with air-separators of various designs.
Telichenko Valery I. +3 more
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Mathematics, 2019 The purpose of this paper is to find out fixed point results for the family of multivalued mappings fulfilling a generalized rational type F-contractive conditions on a closed ball in complete dislocated b-metric space.
Qasim Mahmood +3 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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Extreme points of the closed unit ball in C*-algebras [PDF]
Colloquium Mathematicum, 1997 Summary: We give a short and elementary proof of a characterization of those extreme points of the closed unit ball in \(C^*\)-algebras which are unitary. The result was originally proved by G. K. Pedersen using some methods from the theory of approximation by invertible elements.
Berntzen, Rainer
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Semi-Analytical Closed-Form Solutions of the Ball–Plate Problem
ProcessesMathematical models and numerical simulations are necessary to understand the dynamical behaviors of complex systems. The aim of this work is to investigate closed-form solutions for the ball–plate problem considering a system derived from an optimal control problem for ball–plate dynamics.
Remus-Daniel Ene, Nicolina Pop
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Journal of Function Spaces and Applications, 2013 Common fixed point results for mappings satisfying locally contractive conditions on a closed ball in an ordered complete dislocated metric space have been established.
Muhammad Arshad +2 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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