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A one-parameter family of models that interpolates between the periodicAnderson model with infinite repulsion at half-filling and a model whose groundstate is exactly the Resonating-Valence-Bond state is studied. It is shownnumerically that the excitation gap does not collapse. Therefore the groundstates of the two models are adiabatically connected.Comment: 6 pages, 3 figures Revte

The adiabatic connection between the resonating-valence-bond state and the ground state of the half-filled periodic Anderson model