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Math Help - Closest pair of sets

  1. #1
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    Closest pair of sets

    I need help with an assignment.
    Qn.- Determine the closest pair of sets among following sets :
    A = {(x1,0.4) (x2,0.4) (x3,0.9) (x4,0.5)}
    B = {(x1,0.1) (x2,0.0) (x3,0.9)}
    C = {(x1,0.1) (x2,0.5) (x3,0.9)}

    Please help me out by writing down each step since I have no idea about this chapter.

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  2. #2
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    How close two sets are is not a universally accepted concept, such as the concept of an even number. Each textbook and course can define their own ways of determining how close sets are.

    Therefore, you need at least give us the name of the topic and relevant definitions. I would say that the easiest way is to go through the chapter and try to understand it, even though this may not in fact be easy. Also, this is not a site where people explain topics from the beginning. Once you get some idea, though, feel free to ask questions about the details.
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  3. #3
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    Actually its a question out of our syllabus, so I have no idea. :S
    How would you solve this problem had it been given to you? Use the concepts you know and try doing it, please.
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  4. #4
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    Well, this problem was not given in vacuum, was it? What did you study that week? If you don't have the relevant theory, maybe you can ask your instructor for it. Asking for a solution to a problem is one thing: the instructor may not be willing to let you avoid work. But asking for definitions is legitimate.

    It's as if an assignment asked you to count the number of ambidexter students in your class. If you don't know what this is, you can make a guess that this means blue eyes, for example, and proceed with counting. However, a more mature approach is to put your effort first into finding out what ambidexterity really is.
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