Hello, everyone! Do you know what lead to the error?
Error:
The following cvx variable(s) have been cleared or overwritten:
V
This is often an indication that an equality constraint was written with one
equals '=' instead of two '=='. The model must be rewritten before cvx can
proceed.
CVX: cvx_begin quiet
cvx_solver MOSEK
variable V(M,M*N)
subject to
for n=1:N
V(:,(n-1)*M+1:n*M) == hermitian_semidefinite(M);
end