Proof that fundamental group of the Klein bottle have the next two different presentations:
a) $Gen(a,b \,; baba^{-1}=1)$,
b) $Gen(a,b \,; a^{2}b^{2}=1)$.
I have the proof of (a) and I can prove that (a) is isomorphic to (b) but I need show that (b) is the fundamental group of the Klein bottle using Seifert.
Thanks.