For solutions of = A with A skew-symmetric, lhe lenglh of vector i: is constant. What does this mean in terms of phase-plane trajectories? Use IDE's Matrix Element Input tool, or an open-ended graphic DE solver, to verify this for the following systems, and explain lhe role of the parameter k.
(a)

(b)

The Wronskian Consider the following useful definition, an extension of that given in Sec. 3.6.
Wronskian of Solutions

Transcribed Image Text:

-k o X, k>0 6 元