I am using a fragment shader to, among other things, calculate the eigenvectors of a 2x2 matrix.I can calculate the eigenvalues just fine using the quadratic formula on the characteristic equation ...

Paul A. White, The Computation of Eigenvalues and Eigenvectors of a Matrix, Journal of the Society for Industrial and Applied Mathematics, Vol. 6, No. 4 (Dec., 1958), pp. 393-437 ...

Mathematics Magazine presents articles and notes on undergraduate mathematical topics in a lively expository style that appeals to students and faculty throughout the undergraduate years. The journal ...