Hi, a question regarding the first homework set.
Problem 5 contains the question: Determine the center of Dn, the dihedral group of order 2n. Justify your answer"
I think this is an abstract algebra question and wonder if we are really to solve it?
Furthermore, I wonder for the first part of the same problem, if it's allowed to refer to Heine-Borel (if applicable) or if we are to show the compactness using open covers, finite subcovers etc?
Many thanks in advance,
Sam