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A null or empty set is a set that does not contain any 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.
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.
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.
Members outside of a set are called "elements not in the set" or "complementary elements." In set theory, the complement of a set refers to all elements in the universal set that are not part of the specified set. These elements can be denoted using the complement notation, often represented by a prime symbol or a bar over the set.
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.
It depends on what the elements are.