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February 3rd, 2012, 02:49 PM   #1
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Set Theory Definition

What does it mean when something is not a member of a*b*?
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February 3rd, 2012, 07:15 PM   #2
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Re: Set Theory Definition

What are you using * to mean?
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February 4th, 2012, 01:21 AM   #3
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Re: Set Theory Definition

sorry, it's the kleene star.
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February 4th, 2012, 02:28 PM   #4
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Re: Set Theory Definition

Quote:
Originally Posted by l flipboi l
sorry, it's the kleene star.
What is the kleene star?

What is a*b*?
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February 4th, 2012, 05:03 PM   #5
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Re: Set Theory Definition

OK, so you're looking for some word over an unspecified alphabet which does not match the regular expression a*b*. ba would be one example.
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