The book presents the main approaches in study of algebraic structures of symmetries in models of theoretical and mathematical physics, namely groups and Lie algebras and their deformations. It covers the commonly encountered quantum groups (including Yangians). The second main goal of the book is to present a differential geometry of coset spaces that is actively used in investigations of models of quantum field theory, gravity and statistical physics. The third goal is to explain the main ideas about the theory of conformal symmetries, which is the basis of the AdS/CFT correspondence.
The theory of groups and symmetries is an important part of theoretical physics. In elementary particle physics, cosmology and related fields, the key role is played by Lie groups and algebras corresponding to continuous symmetries. For example, relativistic physics is based on the Lorentz and Poincare groups, and the modern theory of elementary particles -- the Standard Model -- is based on gauge (local) symmetry with the gauge group SU(3) x SU(2) x U(1). This book presents constructions and results of a general nature, along with numerous concrete examples that have direct applications in modern theoretical and mathematical physics.
Автор: Isaev Alexey Название: Dubno 1941: The Greatest Tank Battle of the Second World War ISBN: 1911628437 ISBN-13(EAN): 9781911628439 Издательство: Marston Book Services Рейтинг: Цена: 4950.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: In June 1941 - during the first week of the Nazi invasion in the Soviet Union - the quiet cornfields and towns of Western Ukraine were awakened by the clanking of steel and thunder of explosions; this was the greatest tank battle of the Second World War. About 3,000 tanks from the Red Army Kiev Special Military District clashed with about 800 German tanks of Heeresgruppe South. Why did the numerically superior Soviets fail? Hundreds of heavy KV-1 and KV-2 tanks, the five-turret giant T-35 and famous T-34 failed to stop the Germans. Based on recently available archival sources, A. Isaev describes the battle from a new point of view: that in fact it's not the tanks, but armoured units, which win or lose battles. The Germans during the Blitzkrieg era had superior tactics and organisations for their tank forces. The German Panzer Division could defeat their opponents not by using tanks, but by using artillery, which included heavy artillery, and motorized infantry and engineers. The Red Army's armoured units - the Mechanized Corps - had a lot of teething troubles, as all of them lacked accompanying infantry and artillery. In 1941 the Soviet Armoured Forces had to learn the difficult science - and mostly ‘art' - of combined warfare. Isaev traces the role of these factors in a huge battle around the small Ukrainian town of Dubno. Popular myths about impregnable KV and T-34 tanks are laid to rest. In reality, the Germans in 1941 had the necessary tools to combat them. The author also defines the real achievements on the Soviet side: the blitzkrieg in the Ukraine had been slowed down. For the Soviet Union, the military situation in June 1941 was much worse than it was for France and Britain during the Western Campaign in 1940. The Red Army wasn't ready to fight as a whole and the border district's armies lacked infantry units, as they were just arriving from the internal regions of the USSR. In this case, the Red Army tanks became the ‘Iron Shield' of the Soviet Union; they even operated as fire brigades. In many cases, the German infantry - not tanks - became the main enemy of Soviet armoured units in the Dubno battle. Poorly organized, but fierce, tank-based counter-attacks slowed down the German infantry - and while the Soviet tanks lost the battle, they won the war.
Автор: Isaev Andre Название: Socialpolitische Essais... ISBN: 1249998778 ISBN-13(EAN): 9781249998778 Издательство: Неизвестно Цена: 4518.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Автор: Alexey Somov Название: Representations of the Afterlife in Luke-Acts ISBN: 0567667111 ISBN-13(EAN): 9780567667113 Издательство: Bloomsbury Academic Рейтинг: Цена: 20592.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Questions regarding the afterlife are many, and the Gospel of Luke and the book of Acts pay a great deal of attention to them: why does Luke speak about several different forms of the afterlife? Why is resurrection described as a person's transformation into an angelic being? How many abodes are appointed for the righteous and the wicked after death? Alexey Somov addresses these queries in relation to the apparent confusion and variety found in the text, and in respect of the interrelatedness of these issues, and their connection with other eschatological issues in Luke-Acts, and in relation to the wider cultural context of the Mediterranean world to which Luke belonged. Every culture expresses its beliefs by means of special metaphors that allow it to comprehend supernatural realities in terms of everyday experience. Belief in the afterlife was part of this metaphorical system which Luke shared with the ancient eastern Mediterranean culture. Somov takes his analysis one step further by applying Cognitive Metaphor Theory to selected metaphorical aspects of the afterlife. While the inconsistencies and incoherence of the combined metaphors may seem jarring to a contemporary Western reader, Somov's reading enables a recognition of the specific religious metaphors used, which for Luke would have been current and widely accepted.
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