Linear Phase Portraits: Cursor Entry -- Help
The graphing window at right displays a few trajectories of the linear system x' = Ax. Below the window the name of the phase portrait is displayed, along with the matrix A and the eigenvalues of A.
control the matrix one first sets the trace and the determinant by dragging
the cursor over the diagram at bottom left or by grabbing the sliders
below or to the left of that diagram. Select from among the matrices
with given trace and determinant by dragging the cursor over the window
at upper left, or by grabbing the sliders below and to the
See the Supplementary Notes for a fuller account of this parametrization of matrices.
c 2001 H. Hohn