“…During the last few years it has been claimed that the "rotational" O(D) symmetry (where D is the number of matrices) might be spontaneously broken in the large N limit [76]. This issue has been analyzed in a series of analytical and numerical studies [69,70,71,72,73,74,77,78,79,80,81] and a possible mechanism for having such a spontaneous symmetry breaking has been proposed in [77,78,79].…”