I am studying using CVX on MATLAB and encountering this problem that why is the following constraint: Convex function <= Concave function a valid CVX constraint?
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Basically because if f is concave, then -f is convex. So say we have:
f(x) <= g(x) with f convex, and g concave
then that means
f(x)-g(x) <= 0 f-g is convex

Erwin Kalvelagen
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