A null set.
It's called an infinite set.
The number of elements in a set is called the "cardinality" of the set. It represents the size or count of distinct elements contained within that set. For example, a set containing three elements has a cardinality of three.
null set or empty set, is a set with no elements.
A set that contains no elements is called an empty set, often denoted by the symbol ∅ or {}. If a set contains a natural number of elements, it is simply referred to as a finite set. Thus, the classification of the set depends on whether it has zero elements (empty set) or a positive count of natural numbers.
I believe you are talking about subsets. The empty set (set with no elements) is a subset of any set, including of the empty set. ("If an object is an element of set A, then it is also an element of set B." Since no element is an element of set A, the statement is vacuously true.)
It's called an infinite set.
A null or empty set is a set that does not contain any elements.
It is possible to specify a condition which can't be fulfilled, for example, the intersection of two sets that have no element in common. The result would have no elements. Not allowing this kind of operation would be more complicated than defining a null set (or empty set) that has zero elements.
The number of elements in a set is called the "cardinality" of the set. It represents the size or count of distinct elements contained within that set. For example, a set containing three elements has a cardinality of three.
null set or empty set, is a set with no elements.
I believe you are talking about subsets. The empty set (set with no elements) is a subset of any set, including of the empty set. ("If an object is an element of set A, then it is also an element of set B." Since no element is an element of set A, the statement is vacuously true.)
If all the elements in set A are also elements of set B, then set A is a subset of set B.
If you mean null set, that's a set having no elements, or only zeros as elements.
A finite set or a countably infinite set.
a set having no elements, or only zeros as elements.
The number of elements. A set with n elements has 2n subsets; for example, a set with 5 elements has 25 = 32 subsets.
Binary relationship, relationship set with abbreviated name, and ternary relationship set are the different kinds of sets. A binary relationship in math terms means that there are ordered pairs.