The existence of positive solutions of the nonlinear fourth order problem u(4)(x)=λα(x)f(u(x)),u(0)=u′(0)=u′(1)=u^m(1)=0 is studied,where a:[0,1]→R may change
The axioms of A∞-algebras can be written as Maurer-Cartan equation. Infinitesimal multiplication of a graded associative algebra is defined and the integrabili
The matrix least squares(LS) problem minX ‖AXBT-T‖ F is trivial and its solution can be simply formulated in terms of the generalized inverse of A and B.Its g
On the basis of the Cauchy integral formulas for regular and biregular functions, we define some Cauchy-type singular integral operators. Then we discuss the H
In this paper, two existence theorems are given concerning the following 3-point boundary value problem of second order differential systems with impulses