Decomposition of 2 fourth order differential equations on 4 equations of second order - MathOverflow [closed] most recent 30 from http://mathoverflow.net 2013-05-20T21:35:22Z http://mathoverflow.net/feeds/question/64197 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/64197/decomposition-of-2-fourth-order-differential-equations-on-4-equations-of-second-o Decomposition of 2 fourth order differential equations on 4 equations of second order reptil 2011-05-07T14:38:19Z 2011-05-07T17:28:34Z <p>How to make decomposition of 2 fourth order differential equations on 4 equations of second order</p> <p>$$C_1x''''+C_2x'''+C_3x''+C_4x'+C_5x-C_6y''-C_7y=0$$</p> <p>$$D_1y''''+D_2y'''+D_3y''+D_4y'+D_5y-D_6x''-D_7x=0$$</p> <p>Known constants $$C_i, D_i$$</p> <p>Thank you in advance</p>