<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon" title="c1">i</font>, <font color="Maroon" title="c2">n</font>, <font color="Maroon" title="c3">j</font> be   <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a>;<br/><b>let </b><font color="Maroon" title="c4">K</font> be   <a href="vectsp_1.html#NM3" title="VECTSP_1:NM.3">Field</a>;<br/><b>let </b><font color="Maroon" title="c5">M</font> be   <a href="matrix_1.html#NM5" title="MATRIX_1:NM.5">Matrix</a> of <font color="Maroon" title="c2">n</font>,<font color="Maroon" title="c4">K</font>;<br/>









<b>assume </b><a NAME="E1:42"/><i><font color="Green" title="E35">A1</font></i>: 
( <font color="Maroon" title="c1">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="finseq_1.html#K2" title="FINSEQ_1:func.2">Seg</a> <font color="Maroon" title="c2">n</font> &amp; <font color="Maroon" title="c3">j</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="finseq_1.html#K2" title="FINSEQ_1:func.2">Seg</a> <font color="Maroon" title="c2">n</font> )
 ;<br/>

<b>set </b><font color="Maroon" title="c6">L</font> =  <a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p1">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c3">j</font>;<br/>
<b>set </b><font color="Maroon" title="c7">C</font> =  <a href="laplace.html#K7" title="LAPLACE:func.7">Matrix_of_Cofactor</a> <font color="Maroon" title="c5">M</font>;<br/>
<a NAME="E2:42"/>
 <a href="matrix_1.html#K1" title="MATRIX_1:func.1">width</a> <span class="p1">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">n</font>
 
<b>by </b><i><a class="ref" href="matrix_1.html#T25" title="MATRIX_1:th.25">MATRIX_1:25</a></i>;<br/>
<a NAME="E3:42"/><b>then </b><i><font color="Green" title="E36">A2</font></i>: 
(  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p2">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c3">j</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">n</font> &amp;  <a href="matrix_1.html#K1" title="MATRIX_1:func.1">width</a> <span class="p1">(<span class="default"><a href="laplace.html#K7" title="LAPLACE:func.7">Matrix_of_Cofactor</a> <font color="Maroon" title="c5">M</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">n</font> &amp;  <a href="matrix_1.html#K1" title="MATRIX_1:func.1">width</a> <font color="Maroon" title="c5">M</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">n</font> )
 
<b>by </b><i><a class="ref" href="matrix_1.html#T25" title="MATRIX_1:th.25">MATRIX_1:25</a>, <a class="ref" href="matrix_1.html#D8" title="MATRIX_1:def.8">MATRIX_1:def 8</a></i>;<br/>
<b>thus </b> <a href="matrix_3.html#K12" title="MATRIX_3:func.12">Det</a> <span class="p1">(<span class="default"><a href="matrix11.html#NK5" title="MATRIX11:NK.5">RLine</a> <span class="p2">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c1">i</font>,<span class="p2">(<span class="default"><a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p3">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c3">j</font></span>)</span></span>)</span> = 
 <a href="rlvect_1.html#K7" title="RLVECT_1:func.7">Sum</a> <span class="p1">(<span class="default"><a href="laplace.html#K8" title="LAPLACE:func.8">LaplaceExpL</a> <span class="p2">(<span class="default"><a href="matrix11.html#NK5" title="MATRIX11:NK.5">RLine</a> <span class="p3">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c1">i</font>,<span class="p3">(<span class="default"><a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p4">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c3">j</font></span>)</span></span>)</span>,<font color="Maroon" title="c1">i</font></span>)</span>
<b>by </b><i><a class="txt" href="laplace.html#E1:42"><i><font color="Green" title="E35">A1</font></i></a>, <a class="ref" href="laplace.html#T25" target="_self" title="LAPLACE:th.25">Th25</a></i>
<br/>.= 
 <a href="rlvect_1.html#K7" title="RLVECT_1:func.7">Sum</a> <span class="p1">(<span class="default"><a href="fvsum_1.html#K11" title="FVSUM_1:func.11">mlt</a> <span class="p2">(<span class="default"><a href="matrix_1.html#K9" title="MATRIX_1:func.9">Col</a> <span class="p3">(<span class="default"><a href="laplace.html#K7" title="LAPLACE:func.7">Matrix_of_Cofactor</a> <font color="Maroon" title="c5">M</font></span>)</span>,<font color="Maroon" title="c1">i</font></span>)</span>,<span class="p2">(<span class="default"><a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p3">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c3">j</font></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="laplace.html#E1:42"><i><font color="Green" title="E35">A1</font></i></a>, <a class="txt" href="laplace.html#E3:42"><i><font color="Green" title="E36">A2</font></i></a>, <a class="ref" href="laplace.html#T31" target="_self" title="LAPLACE:th.31">Th31</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="laplace.html#K7" title="LAPLACE:func.7">Matrix_of_Cofactor</a> <font color="Maroon" title="c5">M</font></span>)</span> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c1">i</font></span>)</span> <a href="fvsum_1.html#K13" title="FVSUM_1:func.13">"*"</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p2">(<span class="default"><font color="Maroon" title="c5">M</font> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c3">j</font></span>)</span>
<b>by </b><i><a class="txt" href="laplace.html#E1:42"><i><font color="Green" title="E35">A1</font></i></a>, <a class="txt" href="laplace.html#E3:42"><i><font color="Green" title="E36">A2</font></i></a>, <a class="ref" href="matrix_2.html#T17" title="MATRIX_2:th.17">MATRIX_2:17</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="matrix_1.html#K8" title="MATRIX_1:func.8">Line</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="laplace.html#K7" title="LAPLACE:func.7">Matrix_of_Cofactor</a> <font color="Maroon" title="c5">M</font></span>)</span> <a href="matrix_7.html#K4" title="MATRIX_7:func.4">@</a> </span>)</span>,<font color="Maroon" title="c1">i</font></span>)</span> <a href="fvsum_1.html#K13" title="FVSUM_1:func.13">"*"</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K9" title="MATRIX_1:func.9">Col</a> <font color="Maroon" title="c5">M</font>,<font color="Maroon" title="c3">j</font></span>)</span>
<b>by </b><i><a class="txt" href="laplace.html#E1:42"><i><font color="Green" title="E35">A1</font></i></a>, <a class="txt" href="laplace.html#E3:42"><i><font color="Green" title="E36">A2</font></i></a>, <a class="ref" href="matrix_2.html#T17" title="MATRIX_2:th.17">MATRIX_2:17</a></i>
;<br/>


</div>
