👉 In mathematics, a "cofined" object is an element that can be expressed as the sum of two or more other elements. This means that it has coefficients in common with these other elements. For example, if we have two numbers x and y, then their cofinal sum (x + y) is defined to be either x or y, depending on whether they are both positive or negative. In linear algebra, a "cofined" vector is an element that can be