فهرست مطالب

Mahani Mathematical Research Center - Volume:8 Issue:2, 2019
  • Volume:8 Issue:2, 2019
  • تاریخ انتشار: 1398/08/10
  • تعداد عناوین: 3
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  • Adam Seliga, Alexandra Siposova, Jozef Siran * Pages 37-51
    We investigate possible extensions of various types of continuity of aggregation functionsto their super- and sub-additive transformations. More speci cally, we examine liftsof classical, uniform, Lipschitz and Holder continuities and di erentiability. The classical,uniform, and Lipschitz continuities turn out to be preserved by super- and sub-additivetransformations (albeit for uniform continuity and the super-additive case we prove itonly in dimension one), while the Holder continuity and di erentiability are not.
    Keywords: aggregation function, super-, sub-additive transformations, continuity
  • Ataollah Askari Hemmat *, Zahra Kalateh Bojdi, Maryam KEBRYAEE Pages 53-68
    In this paper we investigate wavelet-fi nite difference method for solving two-dimensional model of drug release in the cardiovascular tissue from the stent. We use a double tensor product to rich a two dimensional wavelet. By using this two dimensional wavelet in space and fi nite difference method for variable t we convert the drug release model to a system of equations. The Lax-Richtmyer theorem shows that this system is convergent and we obtain a good approximation for a solution of our problem.
    Keywords: MRA, Daubechies wavelet, Drug release model, Stent
  • Ardavan Najafi *, Arsham Borumand Saeid Pages 69-80
    The aim of this paper is to introduce the notion of fuzzy points and weak filters in BE-algebras and investigate their properties. We generalize some results in commutative and selfdistributiveweak BE-algebras. Then we establish some relations among filters, fuzzy filters and weak filters in BE-algebras.
    Keywords: fuzzy points in BE-algebras, fuzzy BE-algebras, weak filters, fuzzy filters