Recent content by dado033

thank u very much

is this relashion true? or false? if it is true how can I proof it? (-i)^(-m) = cos((m*pi)/2)+i*sin((m*pi)/2)

how can I understand the difference between algebra, sigma algebra and topology If I take the set A that contains a,b,c,d,e,f the set C that contains A,phi,{a},{b,c,d,e,f} then C is algebra on A and C is sigma algebra on A and (A,C) is topological space is that true? what is the...

how? can u help me?

let C be acollection . of subsets of a set X , then there is asmallest sigma-algebra H containing C proof that: H = the intersection of Bs ,B from F and F = familly of all sigma algebra that contains C