Hilbert C∗-modules are useful tools in AW ∗-algebra theory, theory of operator algbras, operator K-theory, group representation theory and theory of operator spaces. The theory of Hilbert C∗-modules is very interesting on its own. In this paper we give fundamentals of the theory of Hilbert C∗-modules and examine some ways in which Hilbert C∗-modules differ from Hilbert spaces.

The paper develops a quality adjusted professional sports franchise price index for North America based on a repeat sale method. This index reflects trends in the general price of sports franchises holding local market, facility, and team characteristics constant. The price index exhibits considerable volatility but no upward trend over time, unlike previous quality adjusted price indexes based...

M U C H of our present knowledge about selection comes from experiments carried out in environments as constant and optimal as possible. (For general reviews, see ROBERTSON 1956; LERNER 1958; FALCONER 1960a.) Since an individual or a population must be able to cope with a range of environments, data about the extent to which selection gains for an adaptive character under one set of environment...