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Hi, I have a question, why when we study the Delta-Function Potencial we can treat with ##E < V##, since the following relation says
##\frac{d^2 \psi}{dx^2} = \frac{2m}{\hbar^2} (V - E) \psi##
And do not allow it? or it is just ##E < V_{min}## ?
##\frac{d^2 \psi}{dx^2} = \frac{2m}{\hbar^2} (V - E) \psi##
And do not allow it? or it is just ##E < V_{min}## ?