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We study maximum principles for a class of linear, degenerate elliptic differential operators of the second order. The Weak and Strong Maximum Principles are shown to hold for this class of operators in bounded domains, as well as a Hopf type lemma, under suitable hypotheses on the principal part and on the degeneracy set of the operator. We prove a Poincare inequality, which then allows to define the functional setting where to study weak solutions for equations and inequalities involving this class of operators. A good example of such an operator is the Grushin operator, to which we devote...

This book examines the history of translation under European communism, bringing together studies on the Soviet Union, including Russia and Ukraine, Yugoslavia, Hungary, East Germany, Czechoslovakia, Bulgaria, and Poland. In any totalitarian regime maintaining control over cultural exchange is strategically important, so studying these regimes from the perspective of translation can provide a unique insight into their history and into the nature of their power. This book is intended as a sister volume toTranslation Under Fascism(Palgrave Macmillan, 2010) and adopts a similar approach of using...