Thanks in advance for your help and support. I know that this is common topic, posted by many before me. I have read their problems. However, I proved, and it is known, that the following is convex in r .
t=(1+0.5*r*λ*v)/(r-λ) [this is a queuing delay equation]
I’ve expressed it in CVX as
t>=(1+0.5*r*λ*v)*inv_pos(r-λ). However, an error appears as shown in the title. Please, is there a way to express it to avoid this error (real affine*convex)?