"exercise 9.1 (Dr.W.Lindner)" -- it is only a little gym with EigenMath ;) "Define psi with (9.6):" psi = exp(i p x /h) psi "Let EigenMath calculate LHS of (9.5):" -h^2/(2m) d(psi,x,2) "Solve for E by dividing though psi (assume psi=/=0):" E = -h^2/(2m) d(psi,x,2) /psi E Run