Hi! Thanks for the video! There is one small detail I noticed. Seems like you proved that D lies in , and there should be a prove that lies in D as well. UPD: oh but... if r and s belong to D, this is obvious)))
@maximpushkar913 жыл бұрын
This videos helps me understand my algebra class! Thank you!
@adityadwivedi44123 жыл бұрын
Thanks man for doing algebra
@mcqueen4243 жыл бұрын
He’s back !
@dipenganguly26352 жыл бұрын
Very nice explanation... Looking forward more videos from you...
@erikestrella72403 жыл бұрын
Super cool 😎
@stepesh2 жыл бұрын
wonderful!
@tomkerruish29823 жыл бұрын
I'm surprised you didn't just use the general result that any subgroup of index 2 is automatically a normal subgroup. (Sketch of proof: if [G:H] = 2, then the only possible cosets of H are H and G - H, thus every left coset is a right coset, and so H is normal in G.) Of course, you know your audience better than I. Are you in Ma5, or were you able to skip even further to Ma120? (A.k.a Ma5!)