- You can use the 'AND' / 'OR' / 'NOT' option for the things you want to add or remove. - You can return to normal search by pressing the Cancel button.
In the work, we found integral representations for function spaces that are isometric to spaces of entire functions of exponential type, which are necessary for giving examples of equality of approximation characteristics in function spaces isometric to spaces of non-periodic functions. Sufficient conditions are obtained for the nonnegativity of the delta-like kernels used to construct isometric function spaces with various numbers of variables.