TL;DR: In this paper, the authors discuss the effects of different types of transformations on the performance of a mobile phone and show that the effect of these changes on the mobile phone's battery life decreases with time.
TL;DR: The origin of multiple constraints on a control function in both lumped and distributed systems is investigated and equivalence and comparability notions are discussed.
Abstract: The origin of multiple constraints on a control function in both lumped and distributed systems is investigated. Equivalence and comparability notions are discussed. It is pointed out that multiple constraints have a special significance in optimal control problems of infinite-dimensional systems.