Oj. Dittmann, MATRIX EXPONENTIAL SOLUTION OF THE EQUATION OF POLARIZED RADIATIVE-TRANSFER, Journal of quantitative spectroscopy & radiative transfer, 58(2), 1997, pp. 279-286
We present a new way to solve the equation of polarized radiative tran
sfer in the Stokes formalism. The solution is written in terms of the
matrix exponential function and a simple explicit expression for it is
given. This formal solution can be solved analytically for any elemen
tary integrable source functions or be used as a step in a numerical i
ntegration. As an example, the Unno solution is derived in a very eleg
ant way. (C) 1997 Elsevier Science Ltd.