Phase Plane Analysis

Summary

We continue analyzing solution trajectories for linear systems of first order homogeneous differential equations with constant coefficients: $$ \begin{aligned} &\frac{\mathrm{d} x}{\mathrm{~d} t}=a x+b y \\ &\frac{\mathrm{d} y}{\mathrm{~d} t}=c x+d y \end{aligned} $$

We cover

  • Phase portraits,
  • Equilibrium points and their classification,
  • Direction fields.

Full Set of Lecture Notes

The notes for this lecture are available here.

Supplementary Jupyter Notebook

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Introduction

Systems with two real distinct eigenvalues

Systems with a pair of complex-conjugate eigenvalues

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