We prove a theorem about the geometrical interpretation of equivalence relations,and we point out a one-one correspondence between the classification,of a set X
The purpose of this article is to present by using vector space methods,a formula as how to calculate the covariance of the outer product of two independent ran
In this paper,the concepts of product and factorization of lattice implication algebra are proposed,the relation between lattice implication product algebra and
This problem was put forward by H.S.Shapiro on Bull,London Math.Soc.16(1984)490-517,numbered 6.88[1].The original description likes following;Let the function f