And you can do it in one-group theory or multi-group theory. One-group theory assumes that the neutron energy and everything is going on at one energy and we have to make some adjustments.

Okay now we're going to talk about one-group diffusion theory and we're going to explain a bit about why we call it diffusion theory.

The legal position of a one-person company has been denied by the theory of traditional company law with the lack of group personality as a major reason.