MATH135 Lecture Notes - Lecture 6: Cartesian Coordinate System, If And Only If
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23 Sep 2016
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Every set is a subset of itself. Cartesian product defines an ordered pair, where the order of the x and y matters. If (x,y) equals (a,b), then x=a and y=b i. e. if s and t do not share any elements. , cartesian plane (cid:4666) (cid:4667) ?, yes. 2 sets, s and t, are disjoint if. , or s is a subset of t , when all elements of s is in t. A set in s is called proper of set t, if s t, and some elements in t does not. S = t if : although not all elements of t has to be in s. Set equality (=) belong to s: could be proven by examples if it is not a big set. The statement b a is the converse of a b. If and only if ( : nor are they negations of each other.
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