We have a not empty set X and call P(X) the power set of X. For the subsets A,B in X we define the symetric difference:
Proof that the triple is a Ring
Is P(x) with this ringstructure a field?
3.) Proof that P(X) is a Vector Space over the Galois-field.
I have no idea
The first questions:
What is Delta?
Why is in the triple the intersection and not the union like in the definition?
How should I start?
Thanks for help
all the best