RR*=R+ and not R* .....follow some standard textbooks....others may have
many typo errors
On 3/27/07, Ravi <[EMAIL PROTECTED]> wrote:
>
>
> The text books on regular expressions show that:
> RR*=R*
>
> What I feel is that
> RR*=R(є + R + R^2 + R^3 ... )
> =R + R^2 + R^3 + R^4 ...
> =R+
> =R* - {є}
>
> How come RR*=R* is true?
>
>
> >
>
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