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Category Theory
Objects, arrows, functors, universal properties: mathematics about mathematics.
Уроки
{1,2} union {3}
Advanced
Universal properties, limits and adjunctions
Products, coproducts, limits and the adjunctions that unify constructions.
lcm(4, 6)
Instead of asking what things are, ask how they map to each other. Category theory finds the same pattern (a product, a limit, an adjunction) recurring across every branch, and gives it one name.
Повече уроци
Objects and arrows
Universal constructions
Structures
Някои от тези уроци са адаптирани от отворени текстове: Wikipedia. Всяка страница за урока е източникът и лиценза си.
Символи, използвани тук
Докоснете всеки символ за пълното определение, снимка и какво означава всяка буква в него.
Въпроси, които хората задават
What is a functor?
A map between categories that sends objects to objects and arrows to arrows while respecting composition. Taking the fundamental group of a space is a functor from spaces to groups.
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