The same arguments would apply to the structural tensors of curvature of the continuum, namely, to
, to
and to
. If the continuum is amorphous, these structural tensors, together with the
’s that compose them, are meaningless until we have decided upon some theoretical type of congruence of geometry; and even then they represent characteristics of structure that are as conventional as the geometry we have selected. But if, on the other hand, a definite metrics exists in the continuum, then these structural tensors represent curvatures of the continuum, which we may regard as physically existent and no longer as purely conventional.