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1 \documentclass{article} |
1 \documentclass{article} |
2 \usepackage{hyperref} |
2 \usepackage{../style} |
3 \usepackage{amssymb} |
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4 \usepackage{amsmath} |
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5 \usepackage[T1]{fontenc} |
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6 \usepackage{../langs} |
3 \usepackage{../langs} |
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8 \newcommand{\dn}{\stackrel{\mbox{\scriptsize def}}{=}}% |
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11 \begin{document} |
7 \begin{document} |
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13 \section*{Handout 1} |
9 \section*{Handout 1} |
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15 This course is about the processing of strings. Lets start with what we mean by \emph{strings}. Strings |
11 This module is about the processing of strings. Lets start with what we mean by \emph{strings}. Strings |
16 (they are also sometimes referred to as \emph{words}) are lists of characters drawn from an \emph{alphabet}. |
12 (they are also sometimes referred to as \emph{words}) are lists of characters drawn from an \emph{alphabet}. |
17 If nothing else is specified, we usually assume |
13 If nothing else is specified, we usually assume |
18 the alphabet consists of just the lower-case letters $a$, $b$, \ldots, $z$. Sometimes, however, we explicitly |
14 the alphabet consists of just the lower-case letters $a$, $b$, \ldots, $z$. Sometimes, however, we explicitly |
19 restrict strings to contain, for example, only the letters $a$ and $b$. In this case we say the alphabet is the set $\{a, b\}$. |
15 restrict strings to contain, for example, only the letters $a$ and $b$. In this case we say the alphabet is the set $\{a, b\}$. |
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16 |