New: pattern for elim documented.

[helm.git] / helm / software / matita / help / C / sec_tactics.xml

diff --git a/helm/software/matita/help/C/sec_tactics.xml b/helm/software/matita/help/C/sec_tactics.xml
index 812c8ed970a2044472bcfd78653955ce29654fb0..b9857040779315ff3c9187d44d473c79b24a12ce 100644 (file)
--- a/helm/software/matita/help/C/sec_tactics.xml
+++ b/helm/software/matita/help/C/sec_tactics.xml
@@ -672,13 +672,13 @@
   <sect1 id="tac_elim">
     <title>elim</title>
     <titleabbrev>elim</titleabbrev>
-    <para><userinput>elim t using th hyps</userinput></para>
+    <para><userinput>elim t pattern using th hyps</userinput></para>
     <para>
       <variablelist>
         <varlistentry role="tactic.synopsis">
           <term>Synopsis:</term>
           <listitem>
-            <para><emphasis role="bold">elim</emphasis> &sterm; [<emphasis role="bold">using</emphasis> &sterm;] &intros-spec;</para>
+            <para><emphasis role="bold">elim</emphasis> &sterm; &pattern; [<emphasis role="bold">using</emphasis> &sterm;] &intros-spec;</para>
           </listitem>
         </varlistentry>
         <varlistentry>
@@ -695,6 +695,10 @@
           <listitem>
             <para>It proceeds by cases on the values of <command>t</command>,
              according to the elimination principle <command>th</command>.
+             The induction predicate is restricted by
+             <command>pattern</command>. In particular, if some hypothesis
+             is listed in <command>pattern</command>, the hypothesis is
+             generalized and cleared before eliminating <command>t</command>
             </para>
           </listitem>
         </varlistentry>