Let’s say {\bf A}^{M\times N} and {\bf F}^{M\times N} are two matrices. a_{m,n} and f_{m,n} are the (m,n)-th element of {\bf A} and {\bf F}, respectively.

\begin{align} f_{m,n} & \le a_{m,n}\\ f_{m,n} & \ge 0.2\sum_{l=1}^M f_{l,n} - (1-a_{m,n}) \end{align}

The first constraint I can easily express as

```
variable A(M,N) binary
variable F(M,N)
F<= A
```

How can I express the second constraint?

Hint:

F>= 0.2.*?? -(1-A)

Or in a loop?