I have been looking though Ince (Ordinary Differential Equations), nice book.(adsbygoogle = window.adsbygoogle || []).push({});

I enjoyed solving this problem:

6) pp. 157

Integrate the system

x*x''-y*y''=0

x''+y''+x+y=0

[Edinburgh, 1909.]

we may assume x and y are twice differentiable functions

defined everywhere from reals to reals

' denotes differentiation

I would be interested in the methods used by others.

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Fun eode

**Physics Forums - The Fusion of Science and Community**