A note on certain functional determinants. (Summary).
The best L2-approximation by finite sums of functions with separable variables.
A note on certain functional determinants.
A linear inequality of Gronwall's type containing multiple integral
The second order differential equation with an oscillatory coefficient
Some factorizations of matrix functions in several variables
We establish some criteria for a nonsingular square matrix depending on several parameters to be represented in the form of a matrix product of factors which depend on the single parameters.
Some converse theorems in the asymptotic theory of ordinary differential equations
Decomposable functions of several variables.
Decomposition of smooth functions of two multidimensional variables
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