e/Eckmann–Hilton duality

Information
has gloss	eng: In the mathematical disciplines of algebraic topology and homotopy theory, Eckmann–Hilton duality in its most basic form, consists of taking a given diagram for a particular concept and reversing the direction of all arrows, much as in category theory with the idea of the opposite category.
lexicalization	eng: Eckmann Hilton duality
lexicalization	eng: Eckmann-Hilton duality
lexicalization	eng: Eckmann–Hilton duality
instance of	c/Duality theories

Media
media:img	Homotopy extension property.svg
media:img	Homotopy lifting property.svg