Specific homograft tolerance in lymphoid cells of long-lived radiation chimeras.

This is obtained by equating the elements in the first column and first row of the l-matrix with the corresponding element in its product representation obtained by combining any two commensurate 11Z-matrices according to the group property. 6. Ontogenetics. At first appearance, the generalized invariant imbedding relation may seem to have no foundation in the established principles of radiative and neutron transport theory. That is, it appears to have been assembled in an ad hoc manner by means of some examples and an intuitively based inductive leap from the classical principles of invariance. However, recent work in the theory of general radiative processes on arbitrary discrete spaces has provided a firm foundation for not only the discrete version of (i) but its most general counterpart in an arbitrary discrete space.6 Furthermore, the basis for a rigorous derivation in either the discrete or continuous case is given in reference 7. Thus, while not all details have as yet been worked out, there now exists a complete analytical basis for the development of the concept of invariance, as used in the radiative and neutron transport contexts, from the classical R and T operator level through the invariant imbedding relation level up to the generalized level discussed in this note.