X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fhelp%2FC%2Fsec_tactics.xml;h=b9857040779315ff3c9187d44d473c79b24a12ce;hb=393187c5f5a6e71d467ab04b65f3a935701724fb;hp=812c8ed970a2044472bcfd78653955ce29654fb0;hpb=36842ee77114d2fa896d7ffd2333c07cff22b053;p=helm.git

diff --git a/helm/software/matita/help/C/sec_tactics.xml b/helm/software/matita/help/C/sec_tactics.xml
index 812c8ed97..b98570407 100644
--- 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>