I am trying to solve a nonlinear ODE: $$u_{xx}+\tan^2(x)u+gu^2=0$$ using the variational method, and I encountered an intractable integral. What are the strategies to deal with intractable integrals in the framework of variational method?
2026-02-23 13:42:59.1771854179
What are the strategies to deal with intractable integrals encountered when solving ODE using variational method.?
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