Errata for Erling Størmers publications

Correction to Theorem 5.2.3 on page 71.

As stated Theorem 5.2.3 is false due to a wrong application of Krein´s Extension Theorem  (Theorem A.3.1).  In Theorem 5.2.3 the operator system A with the identity matrix 1 in A must be replaced by a real subspace of the self-adjoint nxn matrices.