Let 0【p≤1.The authors give out the boundedness of δ-order Bouchner-Rieszmeans B<sub>R</sub><sup>δ</sup>(f)on the Triebel-Lizorkin spaces <sub>p</sub><sup>α,q
In this paper the concept of positive definite bilinear matrix moment functional. acting on the space of all the matrix valued continuous functions defined on a
Suppose that C is the complex plane and k is a non-negative integer.Define functions Nk-(x)=|x|k if k is even and Nk(x)=x|x|k-1 if k is odd.Some approximation p
A formulation of a differential equation as projection and fixed point pi-Mem alloivs approximations using general piecnvise functions. We prone existence and u
In this paper well-conditioning of boundary value problems for systems of second order difference equa-tions is studied.First,a sufficient condition for the exi