[Electromagnetic force + Weak interaction＋Strong interaction ＋ Gravity]
• Hypothesis theory of 11-dimensional (spatial dimension is 10, one time dimension) comprehensive the five superstring theory that is currently known.
・In M-theory membrane of two-dimensional and 5-dimensional I is considered as a component.
・While it is theoretically to be unified to represent the four force electromagnetic force, gravity, weak force, gravity in one form, this theory is the stage of mathematical hypothesis.
・The M in M-theory can stand for "magic", "mystery", or "matrix" according to taste, and the true meaning of the title should be decided when a more fundamental formulation of the theory is known.