1 <?xml version="1.0" encoding="UTF-8"?>
2 <!-- This DocBook file was created by LyX 2.4.0dev
3 See http://www.lyx.org/ for more information -->
4 <article xml:lang="en_US" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:m="http://www.w3.org/1998/Math/MathML" xmlns:xi="http://www.w3.org/2001/XInclude" version="5.1">
5 <title>Test document</title>
9 <m:alt role='tex'>\Vert,\vert</m:alt>
11 <m:mrow><m:mi>∥</m:mi><m:mo>,</m:mo><m:mi>|</m:mi>
15 </informalequation>A second formula:
18 <m:alt role='tex'>\left\Vert \mathbf{a^{T}\,x}\right\Vert _{2}\leq x_{0}</m:alt>
22 <m:mrow><m:mo form='prefix' fence='true' stretchy='true' symmetric='true'><m:mrow>∥</m:mrow></m:mo>
24 <m:mstyle mathvariant='bold'>
27 <m:mrow><m:mi>a</m:mi>
29 <m:mrow><m:mi>T</m:mi>
31 </m:msup><m:mspace width="6px" /><m:mi>x</m:mi>
34 <m:mo form='postfix' fence='true' stretchy='true' symmetric='true'><m:mrow>∥</m:mrow></m:mo>
37 <m:mrow><m:mn>2</m:mn>
39 </m:msub><m:mo>≤</m:mo>
41 <m:mrow><m:mi>x</m:mi>
43 <m:mrow><m:mn>0</m:mn>
49 </informalequation></para>