X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=helm%2Fsoftware%2Fmatita%2Fhelp%2FC%2Fsec_tactics.xml;h=364401aa5c7b130ded02950e6c72658fc3fb0543;hb=10f29fdd78ee089a9a94446207b543d33d6c851c;hp=193a0e3310f489c1c587955cc1a3210deed2f4a3;hpb=00e0c1d5cff8d5b5588185e1a70352a2e7a1a8e9;p=helm.git

diff --git a/helm/software/matita/help/C/sec_tactics.xml b/helm/software/matita/help/C/sec_tactics.xml
index 193a0e331..364401aa5 100644
--- a/helm/software/matita/help/C/sec_tactics.xml
+++ b/helm/software/matita/help/C/sec_tactics.xml
@@ -344,6 +344,58 @@
       </variablelist>
     </para>
   </sect1>
+  <sect1 id="tac_compose">
+    <title>compose</title>
+    <titleabbrev>compose</titleabbrev>
+    <para><userinput>compose n t1 with t2 hyps</userinput></para>
+    <para>
+      <variablelist>
+        <varlistentry role="tactic.synopsis">
+          <term>Synopsis:</term>
+          <listitem>
+            <para><emphasis role="bold">compose</emphasis> [&nat;] &sterm; [<emphasis role="bold">with</emphasis> &sterm;] [&intros-spec;]</para>
+          </listitem>
+        </varlistentry>
+        <varlistentry>
+          <term>Pre-conditions:</term>
+          <listitem>
+            <para></para>
+          </listitem>
+        </varlistentry>
+        <varlistentry>
+          <term>Action:</term>
+          <listitem>
+            <para>Composes t1 with t2 in every possible way
+              <command>n</command> times introducing generated terms
+              as if <command>intros hyps</command> was issued.</para>
+            <para>If <command>t1:∀x:A.B[x]</command> and
+            <command>t2:∀x,y:A.B[x]→B[y]→C[x,y]</command> it generates:
+             <itemizedlist>
+                <listitem>
+                  <para><command>λx,y:A.t2 x y (t1 x) : ∀x,y:A.B[y]→C[x,y]</command></para>
+                </listitem>
+                <listitem>
+                  <para><command>λx,y:A.λH:B[x].t2 x y H (t1 y) : ∀x,y:A.B[x]→C[x,y]
+                  </command></para>
+                </listitem>
+             </itemizedlist>
+          </para>
+          <para>If <command>t2</command> is omitted it composes 
+            <command>t1</command>
+              with every hypothesis that can be introduced.  
+              <command>n</command> iterates the process.</para>
+          </listitem>
+        </varlistentry>
+        <varlistentry>
+          <term>New sequents to prove:</term>
+          <listitem>
+            <para>The same, but with more hypothesis eventually introduced
+            by the &intros-spec;.</para>
+          </listitem>
+        </varlistentry>
+      </variablelist>
+    </para>
+  </sect1>
   <sect1 id="tac_change">
     <title>change</title>
     <titleabbrev>change</titleabbrev>
@@ -519,10 +571,10 @@
           <term>Action:</term>
           <listitem>
             <para>
-	     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
-	     of sort Prop without right parameters, the tactic runs
+	     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 without
+	     right parameters and of sort Prop or CProp, the tactic runs
 	     <command> 
 	      elim H as H<subscript>1</subscript> ... H<subscript>m</subscript>
 	     </command>, clears <command>H</command>  and runs itself