5 items are filed under this topic.
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A question about the empty set |
2018-06-17 |
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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. |
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A union and interception problem |
2013-10-19 |
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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 set
Answered by Penny Nom. |
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Prove A intersect B =X iff A = X and B = X |
2010-03-06 |
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From Gloria:
how would you prove A intersect B =X iff A = X and B = X
Answered by Tyler Wood. |
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More on infinity and Set Theory |
2009-02-17 |
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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?
Justin
Answered by Robert Dawson. |
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Infinity and Set Theory |
2009-02-17 |
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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?
Justin
Answered by Robert Dawson. |
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