A is a sparse Matrix, B is a constant, how to represent a non-zero element in A is greater than B.

It is not clear what you are trying to do

You can specify `A(m,n) >= B(m,n)`

for the combinations of m and n for which you want `A`

to be non-zero.

Using your example at How to edit the following expression in cvx? in which the ones in `a`

are the non-zero entries for `A`

, you could use

`A(a == 1) >= B(a == 1)`