Dear everyone,

The following constraints

`R<=sum_square(a_l+x_l)+sum(2*(a_l+x_l).*(a-a_l))+sum(2*(a_l+x_l).*(x-x_l))-(sum_square(x)+sum_square(a));`

where ,R is a constant `1*K`

vector , a_l and x_l are the constant `N*K`

real matrix, the x and a are `N*K`

variable matrix .

The CVX results show failure as following

,

Thanks in advance.