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Browsing Faculty Works, Department of Mathematics by Subject "dirac equation"
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(AIP Publishing, 1990-01)For the Dirac equation with potential V(r) obeying ∫∞ 0(1+r)‖V(r)‖d r<∞ we prove a relativistic version of Levinson’s theorem that relates the number of bound states in the spectral gap [−m,m] to the variation of an ...