$lst_tit recursion$lst_titend$type_both
$(lst_syntax)recursion $emph fn$emphend for $emph v$emphend=$emph v1$emphend
to $emph v2$emphend [step $emph st $emphend], or <br/>
$ !recursion $emph fn$emphend for $emph v$emphend in
$emph v1,v2,v3,...$emphend</span>
$lst_mean Computes the outcome of a recursion using the function
$emph fn$emphend in which the
variable $emph v $emphend is replaced successively by values $emph v1$emphend,
..., $emph v2$emphend. <p>
In the second syntax
, the values are given with respect to
each item in
the
list $emph v1
,v2
,...$emphend. <p
> The function $emph fn$emphend should use the variable $emph last$emphend
to indicate the value of the previous recursion step.
And the starting value can be put into the WIMS variable
<span class="tt">$$recursion_start</span>.
</p>