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Whats the relation?

  1. Apr 28, 2004 #1
    This is the example I am going by;
    X={a,b,c,d} Y={c,d} C={b,c}
    P(x)={{a,b,c},{a,b,d},{a,c,d}{b,c,d}
    {a,b},{a,c},{a,d},{b,c},{b,d},{c,d},
    {a},{b},{c},{d},{a,b,c,d},{}}
    This next part I do not understand? AUY=BUY
    Code (Text):

    A[sub]1[/sub]={a,c,d},{a,c},{a,d},{a}
    A[sub]2[/sub]={a,b,c},{a,b,d},{a,d},{a,b,c,d}
    A[sub]3[/sub]={b,c,d},{b,c},{b,d},{b} (=elements of C)
    Y={c,d},{c},{d}

    What I would like to understand is how she came up with A[sub]1[/sub], A[sub]2[/sub], A[sub]3[/sub], and Y?
    I know they are subsets but how?
    I have been tring to figure this out for 3days and I just want to get it.
     
    :confused: :confused: :confused: :confused: :confused:
     
  2. jcsd
  3. Apr 28, 2004 #2

    mathman

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    There is something missing in your problem statement. What are A and B?
     
  4. Apr 28, 2004 #3
    It says A & B = any one of the 16 subsets.
     
  5. Apr 29, 2004 #4
    Is that any help?
     
  6. Apr 29, 2004 #5

    mathman

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    If A and B are each any one of subsets, then AUY=BUY would not be true in many cases. For example A={a} and B={b}. The part called code, A1 etc., seems unrelated to the question before.
     
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