equal
deleted
inserted
replaced
60 |
60 |
61 \item Define what is meant by the derivative of a regular |
61 \item Define what is meant by the derivative of a regular |
62 expressions with respect to a character. (Hint: The |
62 expressions with respect to a character. (Hint: The |
63 derivative is defined recursively.) |
63 derivative is defined recursively.) |
64 |
64 |
65 \item Assume the set $Der$ is defined as |
65 \item Assume the set $Der$ is defined as |
66 |
66 |
67 \begin{center} |
67 \begin{center} |
68 $Der\,c\,A \dn \{ s \;|\; c\!::\!s \in A\}$ |
68 $Der\,c\,A \dn \{ s \;|\; c\!::\!s \in A\}$ |
69 \end{center} |
69 \end{center} |
70 |
70 |