equal
deleted
inserted
replaced
50 \end{center} |
50 \end{center} |
51 |
51 |
52 Write down clearly in each case what you need to prove and |
52 Write down clearly in each case what you need to prove and |
53 what are the assumptions. |
53 what are the assumptions. |
54 |
54 |
55 \item Define what is meant by the derivative of a regular expressions |
55 \item Define what is meant by the derivative of a regular |
56 with respoect to a character. (Hint: The derivative is defined |
56 expressions with respect to a character. (Hint: The |
57 recursively.) |
57 derivative is defined recursively.) |
58 |
58 |
59 \item Assume the set $Der$ is defined as |
59 \item Assume the set $Der$ is defined as |
60 |
60 |
61 \begin{center} |
61 \begin{center} |
62 $Der\,c\,A \dn \{ s \;|\; c\!::\!s \in A\}$ |
62 $Der\,c\,A \dn \{ s \;|\; c\!::\!s \in A\}$ |