  Math Central - mathcentral.uregina.ca  Quandaries & Queries    Q & Q    Topic: set theory   start over

5 items are filed under this topic.    Page1/1            A question about the empty set 2018-06-17 From Andrey:Hello there! I got that an empty set is a subset of every set. There is a question. Is an empty set an element of every set? ∅ ⊆ {x}True ∅ ∈{x}? Sorry if the question is easy. A set theory is a bit confusing.Answered by Penny Nom.     A union and interception problem 2013-10-19 From Zakir:Sir, I have some problem in union there is a Question in a book find B set if A={2,4,6,8} , AUB={2,4,5,6,7,8} and A intersection B={6,8} plz tell me how can I find the B setAnswered by Penny Nom.     Prove A intersect B =X iff A = X and B = X 2010-03-06 From Gloria:how would you prove A intersect B =X iff A = X and B = XAnswered by Tyler Wood.     More on infinity and Set Theory 2009-02-17 From Justin:I greatly appreciate your help I was just wondering from your previous answer, why doesn't Cantor's cardinal numbers in set theory apply to the limit x->0, y=infinity? JustinAnswered by Robert Dawson.     Infinity and Set Theory 2009-02-17 From Justin:I was just wondering is the limit x->0, y=1/x=infinity, the biggest uncountable infinity according to Cantor's cardinal numbers in set theory? JustinAnswered by Robert Dawson.      Page1/1    Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.    about math central :: site map :: links :: notre site français