Jonathan Steinberg – författare

German and Italian fascist armies in the Second World War treated the Jews quite differently. Jews who fell into the hands of the German army ended up in concentration camps; none of those taken by the Italians suffered the same fate. Yet the protectors of the Jews were no philo-Semites, nor were they (often) great respecters of human life. Some of those same officers had sanctioned savage atrocities against Ethiopians and Arabs in the years before the war. Jonathan Steinberg uses this remarkable and poignant story to unravel the motives and forces underpinning both Fascism and Nazism. As a renowned historian of both Germany and Italy, he is uniquely placed to answer the underlying question; why?

German and Italian fascist armies in the Second World War treated the Jews quite differently. Jews who fell into the hands of the German army ended up in concentration camps; none of those taken by the Italians suffered the same fate. Yet the protectors of the Jews were no philo-Semites, nor were they (often) great respecters of human life. Some of those same officers had sanctioned savage atrocities against Ethiopians and Arabs in the years before the war. Jonathan Steinberg uses this remarkable and poignant story to unravel the motives and forces underpinning both Fascism and Nazism. As a renowned historian of both Germany and Italy, he is uniquely placed to answer the underlying question; why?

The Nazis burned books and banned much modern art. However, few people know the fascinating story of German modern dance, which was the great exception. Modern expressive dance found favor with the regime and especially with the infamous Dr. Joseph Goebbels, the Minister of Propaganda. How modern artists collaborated with Nazism reveals an important aspect of modernism, uncovers the bizarre bureaucracy which controlled culture and tells the histories of great figures who became enthusiastic Nazis and lied about it later. The book offers three perspectives: the dancer Lilian Karina writes her very vivid personal story of dancing in interwar Germany; the dance historian Marion Kant gives a systematic account of the interaction of modern dance and the totalitarian state, and a documentary appendix provides a glimpse into the twisted reality created by Nazi racism, pedantic bureaucrats and artistic ambition.

Generalized probabilistic theories (GPTs) allow us to write quantum theory in a purely operational language and enable us to formulate other, vastly different theories. As it turns out, there is no canonical way to integrate the notion of subsystems within the framework of convex operational theories. Sections can be seen as generalization of subsystems and describe situations where not all possible observables can be implemented. Jonathan Steinberg discusses the mathematical foundations of GPTs using the language of Archimedean order unit spaces and investigates the algebraic nature of sections. This includes an analysis of the category theoretic structure and the transformation properties of the state space. Since the Hilbert space formulation of quantum mechanics uses tensor products to describe subsystems, he shows how one can interpret the tensor product as a special type of a section. In addition he applies this concept to quantum theory and compares it with the formulation inthe algebraic approach. Afterwards he gives a complete characterization of low dimensional sections of arbitrary quantum systems using the theory of matrix pencils.