MG11 
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A weak cosmological constant due to residual gravity in a multiply connected Universe

We use a weak field (Newtonian) approximation of gravityand concider the gravitational effect from distant, multiple copies of large collapsed object, taking into accound the finite speed of light. Provided that at least modest amount of inflation occurred in the Universe multiple connectedness does generate an effect similar to that of dark energy, but the amplitude of the effect at the present epoch is too small to explain the observed dark energy density.