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48 \end{center} |
48 \end{center} |
49 |
49 |
50 Write down clearly in each case what you need to prove and |
50 Write down clearly in each case what you need to prove and |
51 what are the assumptions. |
51 what are the assumptions. |
52 |
52 |
53 \item Define what is mean by the derivative of a regular expressions |
53 \item Define what is meant by the derivative of a regular expressions |
54 with respoect to a character. (Hint: The derivative is defined |
54 with respoect to a character. (Hint: The derivative is defined |
55 recursively.) |
55 recursively.) |
56 |
56 |
57 \item Assume the set $Der$ is defined as |
57 \item Assume the set $Der$ is defined as |
58 |
58 |