| (in English)
||Recently, a new concept, primitive chaos, was proposed as a concept closely related to fundamental problems such as determinism and causality [Journal of the Physical Society of Japan, vol.79, pp.15002-1-2, 2010]. Then, under natural conditions, the primitive chaos leads to the characteristic properties of the conventional chaos. In this sense, this primitive chaos is literally a primitive chaos. In this study, the relation of concepts guaranteeing the existence of the primitive chaos is discussed with the aid of the concept of decomposition space.