Combination of convex functions Nonconvex May 16, 2014 K kane0610 May 16, 2014 #1 Can I use CVX in any way for the following function Max sum((a1*log(1+x)*x)/sum(x)) The above function violates DCP rules though. Is there a way out? M Michael C. Grant May 16, 2014 #2 Is it convex? If not, definitely no. If so, still probably no.