/span><span class="params">(<span name="variable">variable: <span name="provingground.Context.addVariable.U" class="extype">U</span></span>)</span><span class="result">: <a href="Context$$AppendVariable.html" name="provingground.Context.AppendVariable" id="provingground.Context.AppendVariable" class="extype">AppendVariable</a>[<span name="provingground.Context.addVariable.U" class="extype">U</span>]</span></span><div class="fullcomment"><dl class="attributes block"><dt>Definition Classes</dt><dd><a href="Co