A new maximal function is introduced in the dual spaces of test function spaces on spacesof homogeneous type. Using this maximal function, we get new characteri
Paper considers the calculation of the values of Gibbs derivatives on finite Abelian groups. Thecalculation procedure is based upon the decision diagram represe
It will be determined under what conditions types of proximinality are transmitted to and from quotient spaces. In the final section, by many examples we show t