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Math Help - Composit Relations

  1. #1
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    Composit Relations

    Question:

    S={(a,c),(b,d),(d,a)}

    Construct S^2.
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  2. #2
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    If S^2 means S \circ S then
     <br />
S \circ S = \left\{ {(b,a),(d,c)} \right\}.
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Plato View Post
    If S^2 means S \circ S then
     <br />
S \circ S = \left\{ {(b,a),(d,c)} \right\}.
    i always wondered how they defined composite relations. i had a feeling they did it this way, but i was praying i was wrong. that seems to get tedious after a while. i've seen problems with S^5, that seems like a pain to find.
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  4. #4
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    Quote Originally Posted by Jhevon View Post
    i always wondered how they defined composite relations. i had a feeling they did it this way, but i was praying i was wrong. that seems to get tedious after a while. i've seen problems with S^5, that seems like a pain to find.
    Be careful! You do realize that some authors change things up.
    It fairly standard for S \circ S; but can get tricky for S \circ R.
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