Put C = CG (G'/N'). Then N ≤ C and G/C is finite. How did these happen??

let G'/N' be cyclic. Put C = CG (G’/N’). Then N ≤ C and G/C is finite. How did these happen??





note: in C = CG (G'/N'), the G on the right side of C must be a subscript..

Put C = CG (G'/N'). Then N ≤ C and G/C is finite. How did these happen??
Can you say what CG is? You should know. Besides "N ≤ C"


Where N does appear??
Reply:does CG mean the centralizer?