Canonical ensemble average of the lamellar fluctuations

The main purpose of this paper is to make it clear that the physical value obtained along the trajectory generated by the new numerical scheme [J. Phy s. Sec. Jpn. 69 (2000) 679.] satisfies the canonical distribution. On the b asis of our proof, the scattering form factors are evaluated from the time evolution of the spatial pattern that fluctuates around the equilibrium lam ellar pattern. Beyond critical values of temperature, the transitions from a lamellar pattern to hexagonal and isotropic patterns occur in the vicinit y of the morphological transition point.