Mathematical Background Concept of linear Invariants Cartesian decomposition of any 3x matrix A As≡(A+A2) Symmetric Ass≡方(A-A2) Skew-symmetric The vectorof a has the following property axv≡Assv The trace of a is defined as the eigenvalues of asMathematical Background • Concept of Linear Invariants Cartesian decomposition of any 3x3 matrix A: The vector of A has the following property: The trace of A is defined as the eigenvalues of As Symmetric Skew-symmetric