CardinalNone

CardinalNone refers to a mathematical concept indicating the absence of any elements in a set that has the size of an infinite quantity called "cardinality." In simpler terms, it describes a set that contains no items at all—an empty set—using a notation that emphasizes its complete lack of elements, even when considering infinite collections. It’s a way mathematicians precisely denote that a set is empty, regardless of how large or complex an infinite set might be.