Response to "comment on 'A new derivation of the plasma susceptibility tensor for a hot magnetized plasma without infinite sums of products of Bessel functions'" [Phys. Plasmas 15, 024701 (2008)]

Hong Qin, Cynthia K. Phillips, and Ronald C. Davidson, have responded to a critical comment on ' A new derivation of the plasma susceptibility tensor for a hot magnetized plasma without infinite sums of products of Bessel functions' by Lerche and associates. The main purpose of this paper is to show that it is not necessary to introduce the infinite sums from the very beginning in the derivation of the plasma susceptibility tensor for a hot magnetized plasma, and there is no sum rule needed at all. If one had to follow the previous redundant approach, which first introduces the finite sums, then the question about the discoverer of these rules become scholarly relevant. Finally after studying carefully the available literature, they have recommended their original conclusion that it was Swanson who first explicitly showed that every infinite sum in 3×3 susceptibility tensor of a magnetized plasma can be reduced to one or two single terms.