Abotaleb Sheikhali

In this Article, we give a simple criterion for the regularity of a tri-linear mapping. We provide if $f:X\times Y\times Z\longrightarrow W $ is a bounded tri-linear mapping and $h:W\longrightarrow S$ is a bounded linear mapping, then $f$ is regular if and only if $hof$ is regular. We also shall give some necessary and sufficient conditions such th...

Let $f:X\times Y\times Z\longrightarrow W $ be a bounded tri-linear map on normed spaces. We say that $f$ is close-to-regular when $f^{t****s}=f^{s****t}$ and $f$ is Aron-Berener regular when all natural extensions are equal. In this manuscript, we have some results on the Aron-Berner regular maps. We investigate the relation between Arens regulari...

Let f : X × Y × Z −→ W be a bounded tri-linear map on normed spaces. We say that f is close-to-regular when f t * * * * s = f s * * * * t and we say that f is Aron-Berner regular when all natural extensions are equal. In this manuscript, we give a simple criterion for the close-to-regularity of tri-linear maps.

Let X, Y, Z and W be normed spaces and f : X × Y × Z −→ W be a bounded tri-linear mapping. In this manuscript, we introduce the topological centers of bounded tri-linear mapping and we invistagate their properties. We study the relationships between weakly compactenss of bounded linear mappings and regularity of bounded tri-linear mappings. We exte...

در این مقاله به خواص آرنز منظم نگاشت دو خطی کران­دار می­پردازیم و نشان می­دهیم که نگاشت دو خطی کران­دار آرنز منظم است اگر و تنها اگر نگاشت خطی با ضابطۀ ضعیف فشرده باشد. سپس قضیه‌ای را اثبات می­کنیم که ویژگی ضعیف فشردگی نگاشت دو خطی کران­دار و آرنز منظم را به یک‌دیگر مرتبط می­سازد. هم‌چنین به بررسی آرنز منظم و خاصیت ضعیف فشردگی نگاشت­های خطی کران­دا...

Let $X,Y,Z$ and $W$ be normed spaces and $f:X\times Y\times Z\longrightarrow W $ be a bounded tri-linear mapping. In this Article, we define the topological centers for bounded tri-linear mapping and we invistagate thier properties. We study the relationships between weakly compactenss of bounded linear mappings and regularity of bounded tri-linear...

Let $f:X\times Y\times Z\longrightarrow W $ be a bounded tri-linear map on normed spaces. We say that $f$ is close-to-regular when $f^{t****s}=f^{s****t}$ and we say that $f$ is completely regular when all natural extensions are equal. In this manuscript, we have some results on the close-to-regular maps and investigate the close-to-regularity of t...

Let X, Y and Z be normed spaces. In this article we give a tool to investigate Arens regularity of a bounded bilinear map f : X Y Z. Also, under some assumptions on and , we give some new results to determine reflexivity of the spaces.