🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPolskiPortuguêsРусскийالعربية한국어中文日本語EntityQ9357062· pop 12· linked from 365 articleshomotopy theorysubfield of algebraic topology dealing with structures invariant under homotopy equivalenceConnectionshomotopyEntitycategoryEntityCategoriesHomotopy theory