In this paper, the property of linear dependence of solutions for higher order linear differential equation f(k)(z)+Ak-2(z)f(k-2)(z) + ··· + A0(z
The existence and multiplicity of positive solutions are studied for a singular Sturm-Liouville boundary value problem with positive Green function,where the no
Nonconvex penalties including the smoothly clipped absolute deviation penalty and the minimax concave penalty enjoy the properties of unbiasedness, continuity a
Let N be a nest on a Banach space X,and AlgN be the associated nest algebra.It is shown that,if there exists a non-trivial element N in N which is complemented