# HG changeset patch
# User nipkow
# Date 975515007 -3600
# Node ID 5929460a41dfe6c3fabb80ec0f8a90a0b17285cd
# Parent  d1bf9ca9008d29926c06c4edd486f22576b9a7c2
*** empty log message ***

diff -r d1bf9ca9008d -r 5929460a41df doc-src/TutorialI/Misc/document/pairs.tex
--- a/doc-src/TutorialI/Misc/document/pairs.tex	Wed Nov 29 13:44:26 2000 +0100
+++ b/doc-src/TutorialI/Misc/document/pairs.tex	Wed Nov 29 17:23:27 2000 +0100
@@ -15,16 +15,21 @@
 $\tau@1 \times (\tau@2 \times \tau@3)$. Therefore we have
 \isa{fst(snd($a@1$,$a@2$,$a@3$)) = $a@2$}.
 
+Remarks:
+\begin{itemize}
+\item
 There is also the type \isaindexbold{unit}, which contains exactly one
 element denoted by \ttindexboldpos{()}{$Isatype}. This type can be viewed
-as a degenerate Cartesian product of 0 types.
-
-Note that products, like type \isa{nat}, are datatypes, which means
+as a degenerate product with 0 components.
+\item
+Products, like type \isa{nat}, are datatypes, which means
 in particular that \isa{induct{\isacharunderscore}tac} and \isa{case{\isacharunderscore}tac} are applicable to
-products (see \S\ref{sec:products}).
-
+terms of product type.
+\item
 Instead of tuples with many components (where ``many'' is not much above 2),
-it is far preferable to use records (see \S\ref{sec:records}).%
+it is preferable to use records.
+\end{itemize}
+For more information on pairs and records see Chapter~\ref{ch:more-types}.%
 \end{isamarkuptext}%
 \end{isabellebody}%
 %%% Local Variables:
diff -r d1bf9ca9008d -r 5929460a41df doc-src/TutorialI/Misc/pairs.thy
--- a/doc-src/TutorialI/Misc/pairs.thy	Wed Nov 29 13:44:26 2000 +0100
+++ b/doc-src/TutorialI/Misc/pairs.thy	Wed Nov 29 17:23:27 2000 +0100
@@ -13,16 +13,21 @@
 $\tau@1 \times (\tau@2 \times \tau@3)$. Therefore we have
 \isa{fst(snd($a@1$,$a@2$,$a@3$)) = $a@2$}.
 
+Remarks:
+\begin{itemize}
+\item
 There is also the type \isaindexbold{unit}, which contains exactly one
 element denoted by \ttindexboldpos{()}{$Isatype}. This type can be viewed
-as a degenerate Cartesian product of 0 types.
-
-Note that products, like type @{typ nat}, are datatypes, which means
+as a degenerate product with 0 components.
+\item
+Products, like type @{typ nat}, are datatypes, which means
 in particular that @{text induct_tac} and @{text case_tac} are applicable to
-products (see \S\ref{sec:products}).
-
+terms of product type.
+\item
 Instead of tuples with many components (where ``many'' is not much above 2),
-it is far preferable to use records (see \S\ref{sec:records}).
+it is preferable to use records.
+\end{itemize}
+For more information on pairs and records see Chapter~\ref{ch:more-types}.
 *}
 (*<*)
 end
diff -r d1bf9ca9008d -r 5929460a41df doc-src/TutorialI/Types/types.tex
--- a/doc-src/TutorialI/Types/types.tex	Wed Nov 29 13:44:26 2000 +0100
+++ b/doc-src/TutorialI/Types/types.tex	Wed Nov 29 17:23:27 2000 +0100
@@ -1,4 +1,5 @@
 \chapter{More about Types}
+\label{ch:more-types}
 
 So far we have learned about a few basic types (for example \isa{bool} and
 \isa{nat}), type abbreviations (\isacommand{types}) and recursive datatpes
@@ -18,7 +19,9 @@
 \section{Numbers}
 \label{sec:numbers}
 
+\index{product type|(}
 \input{Types/document/Pairs}
+\index{product type|)}
 % Check refs to this section to see what is expected of it.
 % Mention type unit