👉 In mathematics, a grouping is a set of elements that are related by an equivalence relation. It's like a circle or a square with more than two sides. A circle has four points at its center and four edges connecting those points. A square has four equal sides and four right angles. When we say "grouping," it means that the elements in a grouping have some relationship to one another, such as being related by an equivalence relation or having certain properties. For example, if you have