For rf why do we go r then f at 4:10, giving (14)(23). I thought rf mean f then r, which would give (12)(34). Do you do left first multiplication in your class? Also do you do cycle multiplication right to left? Thanks!
help, how to find the possible values for φ(ρ) and φ(μ) to produce an isomorphism φ: D3 → S if set S={1/x, 1/(1-x), (x-1)/x, x/(x-1), x, (1-x)} and D3 = {e, ρ, ρ^2, μ, μρ, μρ^2}.
I plan to make them. The class I'm currently teaching is covering chapter 6 right now, so I'm making them for them, but will go back and fill in the gaps.
