[問題] anharmonic oscillator, nonlinear
【出處】
https://physics.stackexchange.com/questions/356376/exact-analytical-solution-for-the-anharmonic-oscillator-with-nonlinear-term
【題目】Solve dx^2/dt^2 + w_0^2*x + a*x^3=0,
with initial conditions: x(t_n)=x_n, and p(t_n)p_n.
My problem and my issue are writtern on the above link. Please check the above
link. The solution should be one of the Jacobi elliptic functions, or the
combination of them.
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