lecture_10_(2_2)_category_theory_(2022) (1080p)

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https://vimeo.com/showcase/9808577
Aim of the course
Most mathematicians are defined by the kind of mathematical structure they study; category theorists are defined by the way they approach mathematical structure.
The guiding idea of category theory is that no mathematical structure exists on its own; it is always an individual in a broader mathematical community. The other members of this community share the same structure, and the individual is connected to them by various structure-preserving maps. In category theory one only considers those properties that can be formulated purely in terms of how individuals relate to other individuals via structure-preserving maps, thus abstracting away from any unique individual characteristics which cannot be formulated in these terms. Contrary to what one might expect, it turns out that many interesting properties can be captured this way.
Indeed, the language of category theory is both rich and useful and by now pervades modern mathematics (in particular, algebra, algebraic geometry and topology), mainly due to the influence of mathematicians like Grothendieck and MacLane.
The aim of this course is to introduce the students to the language of category theory, its main concepts (such as limits and colimits, adjoint functors, monads, presheaves and the Yoneda Lemma).

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