# Need help with Wronskian

• Mar 6th 2010, 07:30 PM
tigergirl
Need help with Wronskian
Let $y_1 and y_2$ be nontrivial solutions of y'' - p(x)y=0. Suppose $W=$ $\left(\begin{array}{cc}y_1&y_2\\y'_1&y'_2\end{arra y}\right)$ is the Wronskian of $y_1 and y_2$. Show that W is a constant.

Do I need to find W'????
• Mar 6th 2010, 07:50 PM
Black
Quote:

Originally Posted by tigergirl

Do I need to find W'????

Yes. Take the derivative of W with respect to x and show that it equals to zero.