Results 81 to 90 of about 142,886 (250)
A Remark for the Hyers–Ulam Stabilities on n-Banach Spaces
Axioms, 2020 In this article, we deal with stabilities of several functional equations in n-Banach spaces. For a surjective mapping f into a n-Banach space, we prove the generalized Hyers–Ulam stabilities of the cubic functional equation and the quartic functional ...
Jaeyoo Choy, Hahng-Yun Chu, Ahyoung Kim
doaj +1 more source
Journal of Mathematical Analysis and Applications, 1991 The author considers nest algebras of operators on Banach spaces and asks how much of the known results about Hilbert space case carry over to Banach space case. If the Banach space is sufficiently looking like a Hilbert space, then some of them carry over: Theorem 1. If \(\mathcal N\) is a regular nest in a reflexive Banach space, then the radical of \
openaire +2 more sources
On M-spaces and Banach spaces [PDF]
, 2008 We define in this paper the concept of C-space, related with M-spaces and Banach spaces. We obtain various properties on these spaces and propose some open problems.
openaire +1 more source
Adaptive Estimation for Weakly Dependent Functional Times Series
Journal of Time Series Analysis, EarlyView.ABSTRACT We propose adaptive mean and autocovariance function estimators for stationary functional time series under 𝕃p−m‐approximability assumptions. These estimators are designed to adapt to the regularity of the curves and to accommodate both sparse and dense data designs.
Hassan Maissoro +2 more
wiley +1 more source
Ostrowski-Type Inequalities for Functions of Two Variables in Banach Spaces
MathematicsIn this paper, we offer Ostrowski-type inequalities that extend the findings that have been proven for functions of one variable with values in Banach spaces, conducted in a remarkable study by Dragomir, to functions of two variables containing values in
Muhammad Amer Latif +1 more
doaj +1 more source
Fixed Point Approximation of Generalized Nonexpansive Mappings in Hyperbolic Spaces
International Journal of Mathematics and Mathematical Sciences, 2015 We prove strong and Δ-convergence theorems for generalized nonexpansive mappings in uniformly convex hyperbolic spaces using S-iteration process due to Agarwal et al.
Jong Kyu Kim +4 more
doaj +1 more source
Unified Asymptotics for Investment Under Illiquidity: Transaction Costs and Search Frictions
Mathematical Finance, EarlyView.ABSTRACT This paper investigates the optimal investment problem in a market with two types of illiquidity: transaction costs and search frictions. We analyze a power‐utility maximization problem where an investor encounters proportional transaction costs and trades only when a Poisson process triggers trading opportunities.
Tae Ung Gang, Jin Hyuk Choi
wiley +1 more source
Approximate solution of a multivariable Cauchy-Jensen functional equation
AIMS MathematicsLet $ n $ be an integer greater than $ 1 $. In this paper, we obtained the stability of the multivariable Cauchy-Jensen functional equation $ nf\bigg(x_1+{\cdots}+x_n, \frac {y_1+{\cdots}+y_n}n\bigg) = \sum\limits_{1\le i, j\le n}f(x_i, y_j) $ in
Jae-Hyeong Bae , Won-Gil Park
doaj +1 more source
Stochastic processes on totally disconnected topological groups
International Journal of Mathematics and Mathematical Sciences, 2003 Stochastic processes on totally disconnected topological groups are investigated. In particular, they are considered for diffeomorphism groups and loop groups of manifolds on non-Archimedean Banach spaces.
S. V. Ludkovsky
doaj +1 more source
Macroscopic Market Making Games
Mathematical Finance, EarlyView.ABSTRACT Building on the macroscopic market making framework as a control problem, this paper investigates its extension to stochastic games. In the context of price competition, each agent is benchmarked against the best quote offered by the others. We begin with the linear case.
Ivan Guo, Shijia Jin
wiley +1 more source