<div dir="ltr">Professor,<div><br></div><div>Could you please explain the following step in Lemma 1.11 in the notes?</div><div><br></div><div><img src="cid:ii_1605b666475908eb" alt="Inline image 1" width="182" height="64"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><p style="font-size:12.8px"><br></p><p style="font-size:12.8px">Thanks,</p><div style="font-size:12.8px"><b>Lucas Duarte Bahia</b></div><div style="font-size:12.8px">MS. Computational Finance Student</div><div style="font-size:12.8px">Carnegie Mellon University</div><div style="font-size:12.8px">Telephone: <a href="tel:(412)%20378-1892" value="+14123781892" style="color:rgb(17,85,204)" target="_blank">(412) 378-1892</a></div></div></div></div>
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