How to deal with the constraint

There is an optimization problem with several constraints.
Variables are marked blue.
(1) (4) (5) (11) are easy to write, how to write the constraint(12) and (13).

Thank you !

Do you have proof of the convexity of 12 and 13?

No,I don’t know how to deal with (12) and (13)

They might not be convex. So you cann’t express them with CVX. CVX only accept convex constraints.

OK, thank you for reminding me.

Rea this carefully.