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S+ Question

Posted by VeerVortex 
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S+ Question
April 04, 2008 05:08PM
Im having trouble with question 10? Ass 1

I dont understand what the textbook is telling me?

Does S+ include the null string sysmbol or not, because S* certainly does.

My understanding is that it does not and that the first option would be false ie

A (S+)* = (S*)* is false

Am i correct?

Looking at the question again i c it has the closure symbol attached to it, so that means (S+)* would include the null string after all making the option True?

Am i correct?

Re: S+ Question
May 05, 2008 01:42PM
S+ is defined on p 17. You are correct, (S+)* includes the null string.
Daphne Becker
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