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Questions on the symbolic (DSolve, DifferentialRoot) and numerical (NDSolve) solutions of differential equations in Mathematica.

2 votes
1 answer
331 views

Solving for the coefficients of a series [duplicate]

Suppose I have a given series $A(z)=\Sigma a_nz^n$ I want to solve a differential equation for $B(z)$ in terms of coefficients of $a_n$ as a series. Possibly with ansatz $B(z)=\Sigma b_nz^n$ or other …
Duke Smith's user avatar
1 vote
1 answer
320 views

NDSolve Convergence Issue

I am trying to use NDSolve to solve r[u] equation below. The problem seems like the slow convergence. I have searched some questions regarding this kind of problem. I think many people answered in so …
Duke Smith's user avatar