<!-- HELM: we don't have a default namespace.
Removed xmlns="http://www.w3.org/1998/Math/MathML" -->
+<!-- HELM: was
<xsl:output method="xml" indent="yes"/>
+-->
+<xsl:output method="xml"/>
+<!-- HELM -->
<xsl:strip-space elements="apply semantics annotation-xml
csymbol fn cn ci interval matrix matrixrow vector