# Numerically solve 2nd order ordinary differential equation

ℒ = -1/2 Laplacian[u[x], {x}] + V[x] u[x];

sort[
NDEigenvalues[
ℒ, u[x], {x, 0, 1}, 5,
Method -> {"SpatialDiscretization" -> {"FiniteElement", "MeshOptions" -> {"MaxCellMeasure" -> 0.001}}}
]
]


I am trying to solve numerically a 2nd order ordinary differential equation. This does not work with Mathematica 10.00?

NDEigensystem was added in version 10.2 (or was it 10.3?) but version 10.0 is not going to work unless you use this.