Abstract
We show how to perform systematically to all orders, two different dimensional renormalizations (or minimal subtractions) directly in polymer theory, in the critical case (for d = 4 - ε, ε ≽ 0). One of the dimensional renormalization schemes is that of field theory and has been justified recently by M. Benhamou and G. Mahoux. The other one, the z-dimensional renormalization scheme is new and renormalizes minimally the Yamakawa parameter z of polymer theory. We explicit the relation of these renormalizations to the « direct renormalization » of J. des Cloizeaux. We recalculate the critical indices to order ε2