Have they been studied? In particular, what is the analogue of the Schmidt theorem for compact operators in Hilbert spaces? Helemskii A. Ya., Lectures and Exercises on Functional Analysis, Ch. 3, ...
Hello, I am looking for a book that studies the set of Hurwitz quaternions (HQ). In particular, I am interested in a connection between HQ and imaginary quadratic fields (IQF); quaternion orders ...