Vitamin B2, also called riboflavin, is essential for proper adrenal function and overall nerve health. Dairy products, such as cheese, are rich sources. Vitamin B2, also called riboflavin, is essential for proper adrenal function and overall nerve health.
n. 1. (Mathematics) maths. a. a set the members of which are all members of some given class: A is a subset of B is usually written AâB. b. proper subset one that is strictly contained within a larger class and excludes some of its members.
Set A is not a proper subset of U because all elements of U are in subset A. Notice that B can still be a subset of A even if the circle used to represent set B was not inside the circle used to represent A. This is illustrated below: As you can see, B is still a subset of A because all its objects or elements (c, and d) are also objects or elements of A. B is again a proper subset because there are elements of A that does not belong to B. A and B are also subsets of the universal set U, but especially proper subsets since there are elements in U that does not belong to A and B.