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kenny87
Is every finite family of subsets of a given set S closed under finite unions?
Just trying to understand sigma algebras. It seems to me that if X is any finite family of subsets of S then the union of the subsets in X is in X. Am I missing something here?
2 AnswersMathematics10 years agoWhich version of football is more physical, American football, soccer or rugby?
Now that the World Cup is over the great debate on which version of football is more physical returns. There were lots of injury time outs in the World Cup showing that association football (soccer) is quite physical, but does it compare to its counterparts. So which is it, American football, association football (soccer), or rugby football?
13 AnswersFootball (American)1 decade ago