دانلود کتاب فضاهای کلیشه ای و جبرها

In the plays of A. P. Chekhov, the action is structured in such a way that the first about 80 % of the time the viewer does not understand where the author is driving. Only during the last 15 minutes, some events happen that explain why all these complex connections were built, and what the public was suggested to think about. Mathematicians in this regard, as a rule, go even further: they start the story so far from afar, so skillfully hide the idea behind endless distracting details, and so obsessively affect the psyche with the chosen formalization that even when the performance is over, only experts can understand its meaning. And even this is not always the case. Following this tradition, it is also desirable to construct an introduction to a mathematical text so that most of the time the author’s goals remain hidden, and only later, over years, the described images gradually start to come to the viewer through the subconscious, influencing his mind and forcing him to stare into emptiness for a long time. If this Introduction will have such an effect on anyone, then I will consider my task completed.