File: APPEND_CONV.doc

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\DOC APPEND_CONV

\TYPE {APPEND_CONV : conv}

\SYNOPSIS
Computes by inference the result of appending two object-language lists.

\KEYWORDS
conversion, list.

\DESCRIBE
For any pair of object language lists of the form {"[x1;...;xn]"} and
{"[y1;...;ym]"}, the result of evaluating
{
   APPEND_CONV "APPEND [x1;...;xn] [y1;...;ym]"
}
\noindent is the theorem
{
   |- APPEND [x1;...;xn] [y1;...;ym] = [x1;...;xn;y1;...;ym]
}
\noindent The length of either list (or both) may be 0.

\FAILURE
{APPEND_CONV tm} fails if {tm} is not of the form {"APPEND l1 l2"}, where
{l1} and {l2} are (possibly empty) object-language lists of the forms
{"[x1;...;xn]"} and {"[y1;...;ym]"}.

\ENDDOC