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      <mo stretchy="false" id="p1.1.m1.1.1.1" xref="p1.1.m1.1.1.1.cmml">→</mo>
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        <ci id="p1.1.m1.1.1.1.cmml" xref="p1.1.m1.1.1.1">→</ci>
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<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="{\displaystyle {\vec {x}}}">
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              <mi>x</mi>
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      </mstyle>
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    <annotation encoding="application/x-tex">{\displaystyle {\vec {x}}}</annotation>
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</math>