I got trouble in dealing with this kind of system. For example,(adsbygoogle = window.adsbygoogle || []).push({});

Ay``+By`+Cy=0

where y=transpose(y1 y2)

A=(1 0

0 1)

B=(0 1

1 0)

C=(1 1

1 1)

May someone give me a book name?

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# Is there any book talking about system of 2nd order ODE?

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