A' (below or in
Cohen's articles) = A*
(in Wikipedia's pseudoinverse discussion)
. (1)
Where a
notation such as A* appears
in the Wikipedia article, it can be read as meaning A-transpose,
written as A'. The
clash occurs because Cohen used the asterisk suffix, *, to
indicate the fundamental metamer, which has nothing to do
with transpose, or with complex numbers. In everything
below, Cohen's notation is followed. The prime symbol, ',
denotes matrix transpose, and the asterisk, *, denotes a
vector projected into a subspace.