1<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> 2 <mrow> 3 <mi>p</mi> 4 <mspace width="1em"/> 5 <mo>=</mo> 6 <mspace width="1em"/> 7 <mn>1</mn> 8 <mo>−</mo> 9 <mi>q</mi> 10 <mspace width="1em"/> 11 <mo>=</mo> 12 <mspace width="1em"/> 13 <msub> 14 <mi>I</mi> 15 <mi>x</mi> 16 </msub> 17 <mfenced> 18 <mrow> 19 <mi>a</mi> 20 <mo>,</mo> 21 <mi>b</mi> 22 </mrow> 23 </mfenced> 24 <mspace width="1em"/> 25 <mo>=</mo> 26 <mspace width="1em"/> 27 <mn>1</mn> 28 <mo>−</mo> 29 <msub> 30 <mi>I</mi> 31 <mi>y</mi> 32 </msub> 33 <mfenced> 34 <mrow> 35 <mi>b</mi> 36 <mo>,</mo> 37 <mi>a</mi> 38 </mrow> 39 </mfenced> 40 <mspace width="1em"/> 41 <mo>;</mo> 42 <mspace width="1em"/> 43 <mi>y</mi> 44 <mo>=</mo> 45 <mn>1</mn> 46 <mo>−</mo> 47 <mi>x</mi> 48 </mrow> 49</math> 50 51