<xs:attribute name="mathsize"> <xs:simpleType> <xs:union memberTypes="simple-size length-with-unit"/> </xs:simpleType> </xs:attribute>
< mml:munder xmlns:mml = "http://www.w3.org/1998/Math/MathML" >
< mml:mstyle mathsize = "140%" displaystyle = "true" >
< mml:mo>
∑
</ mml:mo>
</ mml:mstyle>
< mml:mrow>
< mml:mi>
N
</ mml:mi>
(
h
)
</ mml:mrow>
</ mml:munder>