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13 Cards in this Set
- Front
- Back
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Relation
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a set of ordered pairs
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Triangle Relation
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(x,y,z)if and only if the absolute value of x-y<z<x+y
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P
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all positive real numbers
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P0
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all nonnegative real numbers
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N
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all negative real numbers
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N0
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all nonpositive real numbers
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I
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Integers
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I+
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Positive Integers
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Membership Statement
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(x,y) is an element of K
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Relationship Statement
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yKx
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Converse of a Relation
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A is a converse of B if (x,y) is an element of A, then (y,x) is an element of B
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Domain of a Relation
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The set of all first components
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Symmetric Relation
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A relation whose converse is itself
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