The phase equivalent relativistic NN potential, which is related by anonlinear equation to the original nonrelativistic potential, is used toconstruct the mass operator (rest Hamiltonian) of the 3-nucleon system.Employing the CD Bonn NN potential, the solution of the relativistic 3N Faddeevequation for $^3$H shows slightly less binding energy than the correspondingnonrelativistic result. The effect of the Wigner spin rotation on the bindingis very small.
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