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Appendix A Qualitative Analysis of Differential Equations
G. Bard Ermentrout and Joel E. Keizer

A.1 Matrix and Vector Manipulation
A.2 A Brief Review of Power Series
A.3 Linear ODEs
A.3.1 Solution of Systems of Linear ODEs
A.3.2 Numerical Solutions of ODEs
A.3.3 Eigenvalues and Eigenvectors
A.4 Phase Plane Analysis
A.4.1 Stability of Linear Steady States
A.4.2 Stability of Nonlinear Steady States
A.5 Bifurcation Theory
A.5.1 Bifurcation at a Zero Eigenvalue
A.5.2 Bifurcation at a Pair of Imaginary Eigenvalues
A.6 Perturbation Theory
A.6.1 Regular Perturbation
A.6.2 Resonances
A.6.3 Singular Perturbation Theory
A.7 Exercises
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