We obtain simple and generally applicable conditions for the existence of mixed moments E([X′ AX]u/[X′ BX]v) of the ratio of quadratic forms T = X′AX/X′BX, where A and B are n × n symmetric matrices ...
THESE are Nos. 3, 4, and 5 of the Cambridge Tracts in Mathematics and Mathematical Physics, which are intended to help students by providing them with brief and readable introductions to mathematical ...
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