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0:00 Intro 0:23 The lecturer will be introduced by mathematician Zsolt Páles, chairman of the Mathematical Sciences Department of the Hungarian Academy of Sciences, host of the evening 4:42 Presentation by András Stipsicz 33:38 Questions and answers In our usual three-dimensional space, we have a clear idea of what three dimensions are. But are there higher dimensional spaces? If there are, are they worth studying? The mathematician's answer is obvious: yes, these are very important questions. However, it turns out that there are some particularly interesting dimensions where things work differently than we previously thought. The best example of such a dimension is the case of four dimensions. Why is this different from the others? We will try to list arguments for this. About András Stipsicz, mathematician, regular member of the Hungarian Academy of Sciences. For more than twenty years, he has been an employee of the Alfréd Rényi Mathematical Research Institute, currently its director. His research area is differential topology, including the theory of four-dimensional spaces and the relationship between these spaces and three-dimensional knots. #mathematics #four dimensions #topology #tudományünnep #mta #magyartudomnosakadémia