nt,Double)⇒Double):Double"></a>
      <h4 class="signature">
      <span class="modifier_kind">
        <span class="modifier"></span>
        <span class="kind">def</span>
      </span>
      <span class="symbol">
        <span class="name">_kurt</span><span class="params">(<span name="r">r: <a href="../Vec.html" class="extype" name="org.saddle.Vec">Vec</a>[<span class="extype" name="scala.Int">Int</span>]</span>, <span name="subOp">subOp: (<span class="extype" name="scala.Int">Int</span>, <span class="e