Generalized reduced modulus in Euclidean space

In Euclidean space condensers with variable potential levels and the presence of a free part at the boundary are studied. The asymptotic formula of the modulus of such condenser is obtained when the plates are pulled into points. The generalized reduced modulus is defined as the second term of this asymptotics. The relation between the reduced modulus and the discrete energy of the Robin function, monotonicity, and polarization behavior are established.