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% $Id$
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\chapter{Standard Isabelle symbols}\label{app:symbols}
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Isabelle supports an infinite number of non-ASCII symbols, which are
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represented in source text as \verb,\<,$name$\verb,>, (where $name$ may be any
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identifier). It is left to front-end tools how these symbols are presented to
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the user. The following predefined standard symbols are available by default
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for Isabelle document output; most of these are also supported by
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Proof~General when used together with the X-Symbol package.
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Any symbol (or plain ASCII character) may be prefixed by \verb,\<^sup>, for
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superscript and \verb,\<^sub>, for subscript; e.g.\ \verb,A\<^sup>\<star>, is
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presented in {\LaTeX} as \isa{A\isactrlsup{\isasymstar}}. Most symbols (and
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all ASCII characters) may be printed in bold by prefixing \verb,\<^bold>,, as
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in \verb,\<^bold>\<alpha>, which is printed as
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\isa{\isactrlbold{\isasymalpha}}. Note that super- and subscripts may
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\emph{not} be combined with bold style.
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See also Chapter~\ref{ch:present} for more details on Isabelle document
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preparation.
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\begin{center}
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\input{syms}
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\end{center}
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%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: "system"
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%%% End:
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