This result gives to a variety of related questions which, as far as we are aware, have not been explored. The most obvious question whether there is an analogue theorem 2.6 for Mn(C[a,b]). Our proof uses the fact that one has an explicit formula for the eigenvalues in the 2*2 case; Thus an entirely different approach would be required in the general case. Another question that could be asked is, if one assumes "sufficient" differentiability, then the conditions on the eigenvalues can be removed. Example 2.8 shows that even if the hermitian matrix has C^∞entries, it may not be diagonalizable. Finally we raise the question whether more can be done if the entries are analytic