Algebraic and Finite Extensions : Let F be a finite extension of K, such that [F:K]=p, a prime number. If u is an element of F but u is NOT an element of K, show that F=K(u).
Let F be a finite extension of K, such that [F:K]=p, a prime number. If u is an element of F but u is NOT an element of K, show that F=K(u).
Nonisomorphic Central Extensions - Describe all nonisomorphic central extensions of Z_2 x Z_2 by a cyclic group Z_n for arbitrary n, meaning central extensions of the form:
1 --> Z_n --> G --> Z_2 x Z_2 --> 1
Basis and Finite and Infinite Field Extensions - Find a basis for the extension of and also calculate
We know already that is infinite.
Give an example of fields and (with neither nor equal to ) such that:
a) and are both infi ...