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Math Help - Pumping Lemma

  1. #1
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    Question Pumping Lemma

    How would I use the pumping lemma to show L = {(ab^n)(ab^n), n>=0} is not regular?

    What I would do is this:
    Choose s=ab^p ab^p
    and |xy| <= p so xy = a because ab^p would be one more always
    so if you increase the value of a y (ay^iz) then u would have more a's in the first section than the second, hence it is not regular?
    Last edited by taurus; October 25th 2010 at 07:32 PM.
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