# Questions tagged [boundary-conditions]

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### Using DSolve, For A System With A Piecewise Function, And For Given Boundary & Continuity Conditions

I'm trying to solve a system of ODE's, analytically, to find the integration constants. The system is the following (with zUpper=125 000 and zLower= 200 000). For 0 <= z <= zUpper: 3 T''[z] == 0....
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### Numerical solution of differential equation with DiracDelta fit boundary condition at zero poorly

I need to solve: $x^2y''(x)+(2x+1)y'(x)-x^2\omega^2y(x)=\frac{-\omega^2\delta(x-x_0)}{4\pi},x\in[0,\infty)$ with boundary conditions:$y(0)=1,\ y(\infty)=0$ , $\omega$ is a function of this form: ...
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### Using NeumannValue in finite element method to replace a derivative boundary condition in NDSolve to overcome a computational overflow

I am trying to implement and evaluate the function GeneratePsiOfX. The definition of GeneratePsiOfX is: ...
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### A Simple equation [closed]

I don't know why is not working?!! ...
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