procedural : some improvements.

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

diff --git a/matita/help/C/sec_tactics.xml b/matita/help/C/sec_tactics.xml
index aa9610df0aa83e22c517da9782111274710a0d56..cad04a53c400a3ab17ba867ca49fe9429aedc5b0 100644 (file)
--- a/matita/help/C/sec_tactics.xml
+++ b/matita/help/C/sec_tactics.xml
@@ -496,8 +496,7 @@
     <title>decompose</title>
     <titleabbrev>decompose</titleabbrev>
     <para><userinput>
-     decompose (T<subscript>1</subscript> ... T<subscript>n</subscript>) 
-     H as H<subscript>1</subscript> ... H<subscript>m</subscript>
+     decompose as H<subscript>1</subscript> ... H<subscript>m</subscript>
     </userinput></para>
     <para>
       <variablelist>
@@ -506,10 +505,6 @@
           <listitem>
             <para>
             <emphasis role="bold">decompose</emphasis>
-            [<emphasis role="bold">(</emphasis>
-            &id;…
-            <emphasis role="bold">)</emphasis>]
-            [&id;] 
             [<emphasis role="bold">as</emphasis> &id;…]
            </para>
           </listitem>
@@ -517,26 +512,22 @@
         <varlistentry>
           <term>Pre-conditions:</term>
           <listitem>
-            <para> 
-            <command>H</command> must inhabit one inductive type among  
-            <command>
-             T<subscript>1</subscript> ... T<subscript>n</subscript>
-            </command>
-            and the types of a predefined list.
-           </para>
+            <para>None.</para>
           </listitem>
         </varlistentry>
         <varlistentry>
           <term>Action:</term>
           <listitem>
             <para>
-            Runs <command>
-             elim H H<subscript>1</subscript> ... H<subscript>m</subscript>
-            </command>, clears <command>H</command> and tries to run itself
-            recursively on each new identifier introduced by 
+            For each each premise <command>H</command> 
+            of type <command>T</command> in the current context
+            where <command>T</command> is a non-recursive inductive type
+            withour right parameters, the tactic runs
+            <command> 
+             elim H as H<subscript>1</subscript> ... H<subscript>m</subscript>
+            </command>, clears <command>H</command>  and runs itself
+            recursively on each new premise introduced by 
             <command>elim</command> in the opened sequents. 
-            If <command>H</command> is not provided tries this operation on
-            each premise in the current context.
            </para>
           </listitem>
         </varlistentry>