Menabrea's theorem is subject to the same restriction. It needs that m − − i > n / 2 is valid. It is i the order of the support reaction, single force i = 0 , moment i = 1 . Except for a Kirchhoff plate and i = 0 (single force as support reaction), it is generally not valid in 2 − − D and 3 − − D because the presence of point supports results in infinitely large energy.