# Search results

Mathematical Methods in the Applied Sciences > 45 > 8 > 4408 - 4427

Fundamenta Informaticae > 2021 > Vol. 180, nr 4 > 333--350

Mathematical Methods in the Applied Sciences > 44 > 10 > 7979 - 7994

International Journal of Applied Mathematics and Computer Science > 2021 > Vol. 31, no. 2 > 195--218

Computational and Applied Mathematics > 2019 > 38 > 4 > 1-18

*m*,

*n*)-ideal, fuzzy (

*m*, 0)-ideal and fuzzy (0,

*n*)-ideal of a semigroup

*S*for any positive integers

*m*and

*n*. This generalizes the concept of a fuzzy bi-ideal, fuzzy right ideal and fuzzy left ideal. After that, some properties of a fuzzy (

*m*,

*n*)-ideal, fuzzy (

*m*, 0)-ideal and fuzzy (0,

*n*)-ideal have been investigated. We also characterize different classes...

Results in Mathematics > 2019 > 74 > 3 > 1-33

*A*,

*m*)-symmetric if it satisfies the operator equation $$\displaystyle \sum \nolimits _{k=0}^{m}(-1)^{m-k} \;{m\atopwithdelims ()k}T^{*k}AT^{m-k}=0.$$ ∑k=0m(-1)m-kmkT∗kATm-k=0. This class of operators seems a natural generalization of

*m*-symmetric operators on a Hilbert space...

Monatshefte für Mathematik > 2019 > 190 > 4 > 689-724

Complex Analysis and Operator Theory > 2019 > 13 > 3 > 1481-1510

Zeitschrift für angewandte Mathematik und Physik > 2019 > 70 > 2 > 1-20

Semigroup Forum > 2019 > 99 > 1 > 169-195

*p*-adic integers by Dunkl and Ramirez (Trans Am Math Soc 202:339–356, 1975), as hypergroup deformation of the max semigroup structure on the linearly ordered set $$\mathbb {Z}_+$$ Z + of the non-negative integers along the diagonal. This works as motivation for us to study hypergroups...

Semigroup Forum > 2019 > 99 > 2 > 260-292

*S*is $$\aleph _0$$ ℵ 0 -categorical if, for any natural number

*n*, the action of its group of automorphisms $${\text {Aut}}(S)$$ Aut ( S ) on $$S^n$$ S n has only finitely many orbits. We show that $$\aleph _0$$ ℵ 0 -categoricity transfers to certain important...

Journal of Mathematical Analysis and Applications > 2018 > 468 > 1 > 161-168

Mediterranean Journal of Mathematics > 2018 > 15 > 3 > 1-23

Proceedings - Mathematical Sciences > 2018 > 128 > 2 > 1-20

*L*be a self-adjoint positive operator on $$L^2(\mathbb {R}^n)$$ L2(Rn) . Assume that the semigroup $$e^{-tL}$$ e-tL generated by $$-L$$ -L satisfies the Gaussian kernel bounds on $$L^2(\mathbb {R}^n)$$ L2(Rn) . In this article, we study weighted local Hardy space $$h_{L,w}^{1}(\mathbb {R}^n)$$ hL,w1(Rn) associated with

*L*in terms of the area function characterization, and prove their atomic...

Integral Equations and Operator Theory > 2018 > 90 > 2 > 1-14

*A*generates a holomorphic contraction semigroup and

*B*is a

*A*-infinitesimally small generator of a contraction semigroup, in particular, if

*B*is a bounded operator. Inspired by studies of evolution...

Journal of Mathematical Analysis and Applications > 2018 > 459 > 1 > 604-613

Semigroup Forum > 2019 > 98 > 1 > 22-30

*A*be the generator of a $$C_0$$ C 0 -semigroup $$(e^{At})_{t\ge 0}$$ ( e At ) t ≥ 0 on a Banach space $$\mathcal {X}$$ X and

*B*be a bounded operator in $$\mathcal {X}$$ X . Assuming that $$\int _{0}^{\infty } \Vert e^{At}\Vert \Vert e^{Bt}\Vert dt<\infty $$ ∫ 0 ∞ ‖ e At ‖ ‖ e Bt ‖ d t < ∞ and the commutator $$AB-BA$$...

Journal of Structural Chemistry > 2018 > 59 > 1 > 120-125

Journal of Algebra > 2017 > 492 > C > 419-456