G_k*W*G_k'
is non-convex, and would be non-convex even if G_K
and W
were scalars. Even G_k*W
and W*G_k'
would both be non-convex.
G_k*W*G_k'
is non-convex, and would be non-convex even if G_K
and W
were scalars. Even G_k*W
and W*G_k'
would both be non-convex.