Hi there,

Be M a set and K a field. Now I shall prove that

V(A) = {f el map(M,K) | f(x)=0, if x isn't el A)

really is a vector subspace of map(M,K) for subset .

I got more tasks similar to that one and I'ld gladly see how I have to use the terms for subspace-proofs, 'cause I haven't any idea.

Many thanks,

Marc