How to write the constraint “diag(A)=I”? I is the unit matrix and A is a n*n hermite semidefinite matrix.

`diag(A) == 1`

constrains all diagonal elements of `A`

to 1. `diag(A) == ones(n,1)`

does the same thing. Noe that `==`

rather than `=`

is needed for equality constraint.

Thank you very much!!!