On the least upper bound on the number of grounded VCVS's required for the realization of grounded active RC multiport networks with a minimum number of capacitors

The proof is given of a new theorem concerning the least upper bound on the number of grounded voltage-controlled voltage sources (VCVS's) required for the realization of multiport network functions by means of grounded active RC networks containing grounded VCVS's and using the theoretically minimum number of grounded capacitors.