👉 In mathematics, the term "coendure" is often used to refer to a type of algebraic structure or object that combines elements from several different categories. It is typically defined as a multivariate object that has both a finite number of variables and a finite number of relations or functions that define its structure. The concept of coendures was introduced by Peter Scholze in his work on the theory of differential equations. These objects are not just mathematical structures, but rather they can be used