Help me with this

, , .

I tried to solve it, but I got non-elementary integral (Crying)

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- Jan 12th 2010, 09:01 PMMentThe second order ODE
Help me with this

, , .

I tried to solve it, but I got non-elementary integral (Crying) - Jan 13th 2010, 04:26 AMmr fantastic
- Jan 13th 2010, 05:15 AMMent
- Jan 13th 2010, 05:23 AMHallsofIvy
I guess, then, the question is why you would

**expect**to get a solution in terms of an elementary integral! That's a**very**non-linear equation and non-linear differential equations tend to have non-elementary solutions. Something as simple (comparatively) as y"= sin(y) has solutions that can only be written in terms of elliptic integrals. - Jan 13th 2010, 11:05 AMDeMath