<dictionary>
<operator name="⋃" form="infix" stretchy="false" lspace="mediummathspace" rspace="mediummathspace"/>
<operator name="⋂" form="infix" stretchy="false" lspace="mediummathspace" rspace="mediummathspace"/>
<dictionary>
<operator name="⋃" form="infix" stretchy="false" lspace="mediummathspace" rspace="mediummathspace"/>
<operator name="⋂" form="infix" stretchy="false" lspace="mediummathspace" rspace="mediummathspace"/>