%0 Journal Article %T The Duality between Corings and Ring Extensions %A Florin F. Nichita %A Bartosz Zielinski %J Axioms %D 2012 %I MDPI AG %R 10.3390/axioms1020173 %X We study the duality between corings and ring extensions. We construct a new category with a self-dual functor acting on it, which extends that duality. This construction can be seen as the non-commutative case of another duality extension: the duality between finite dimensional algebras and coalgebra. Both these duality extensions have some similarities with the Pontryagin-van Kampen duality theorem. %K corings %K ring extension %K duality %K Yang¨CBaxter equation %U http://www.mdpi.com/2075-1680/1/2/173