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<b>let </b><font color="Maroon">c<sub>5</sub></font>, <font color="Maroon">c<sub>6</sub></font> be  non <a href="struct_0.html#V3">empty</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/><b>let </b><font color="Maroon">c<sub>7</sub></font> be  <a href="pre_topc.html#V5">continuous</a> <a href="struct_0.html#NM7">Function</a> of <font color="Maroon">c<sub>5</sub></font>,<font color="Maroon">c<sub>6</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>8</sub></font>, <font color="Maroon">c<sub>9</sub></font> be   <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">c<sub>5</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>10</sub></font>, <font color="Maroon">c<sub>11</sub></font> be    <a href="borsuk_2.html#M1">Path</a> of <font color="Maroon">c<sub>8</sub></font>,<font color="Maroon">c<sub>9</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>12</sub></font>, <font color="Maroon">c<sub>13</sub></font> be    <a href="borsuk_2.html#M1">Path</a> of <font color="Maroon">c<sub>7</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>8</sub></font>,<font color="Maroon">c<sub>7</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>9</sub></font>;<br/>









<b>assume </b><b>that </b><br/><a NAME="E1:33"/><i><font color="Green">E13</font></i>: 
<font color="Maroon">c<sub>10</sub></font>,<font color="Maroon">c<sub>11</sub></font> <a href="borsuk_2.html#R3">are_homotopic</a> 
 <b>and </b><br/><a NAME="E2:33"/><i><font color="Green">E14</font></i>: 
<font color="Maroon">c<sub>12</sub></font> <a href="funct_2.html#R2">=</a> <font color="Maroon">c<sub>7</sub></font> <a href="partfun1.html#K1">*</a> <font color="Maroon">c<sub>10</sub></font>
 <b>and </b><br/><a NAME="E3:33"/><i><font color="Green">E15</font></i>: 
<font color="Maroon">c<sub>13</sub></font> <a href="funct_2.html#R2">=</a> <font color="Maroon">c<sub>7</sub></font> <a href="partfun1.html#K1">*</a> <font color="Maroon">c<sub>11</sub></font>
 ;<br/>

<b>consider </b><font color="Maroon">c<sub>14</sub></font> being    <a href="borsuk_6.html#M1">Homotopy</a> of <font color="Maroon">c<sub>10</sub></font>,<font color="Maroon">c<sub>11</sub></font>;<br/>
<b>take </b><font color="Maroon">c<sub>15</sub></font> = <font color="Maroon">c<sub>7</sub></font> <a href="partfun1.html#K1">*</a> <font color="Maroon">c<sub>14</sub></font>; <i><font color="Red">:: according to </font></i><a class="ref" href="borsuk_2.html#D7">BORSUK_2:def 7</a><br/>

<a NAME="E5:33"/>
<font color="Maroon">c<sub>14</sub></font> is <a href="pre_topc.html#V5">continuous</a>
 
<b>by </b><i><a class="txt" href="topalg_3.html#E1:33"><i><font color="Green">E13</font></i></a>, <a class="ref" href="borsuk_6.html#D13">BORSUK_6:def 13</a></i>;<br/>
<b>hence </b><a NAME="E6:33"/>
<font color="Maroon">c<sub>15</sub></font> is <a href="pre_topc.html#V5">continuous</a>
 <b>by </b><i><a class="ref" href="tops_2.html#T58">TOPS_2:58</a></i>;<br/>

<b>let </b><font color="Maroon">c<sub>16</sub></font> be   <a href="pre_topc.html#NM2">Point</a> of <a href="borsuk_1.html#K20">I[01]</a> ;<br/>

<b>thus </b><font color="Maroon">c<sub>15</sub></font> <a href="binop_1.html#K1">.</a> <font color="Maroon">c<sub>16</sub></font>,0 = 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_1.html#K1">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>14</sub></font> <a href="binop_1.html#K1">.</a> <font color="Maroon">c<sub>16</sub></font>,<font color="Maroon">c<sub>3</sub></font></span>)</span>
<b>by </b><i><a class="txt" href="topalg_3.html#E1"><i><font color="Green">Lemma1</font></i></a>, <a class="ref" href="binop_1.html#T30">BINOP_1:30</a></i>
<br/>.= 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_2.html#K3">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>10</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>16</sub></font></span>)</span>
<b>by </b><i><a class="txt" href="topalg_3.html#E1:33"><i><font color="Green">E13</font></i></a>, <a class="ref" href="borsuk_6.html#D13">BORSUK_6:def 13</a></i>
<br/>.= 
<font color="Maroon">c<sub>12</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>16</sub></font>
<b>by </b><i><a class="txt" href="topalg_3.html#E2:33"><i><font color="Green">E14</font></i></a>, <a class="ref" href="funct_2.html#T21">FUNCT_2:21</a></i>
;<br/>

<b>thus </b><font color="Maroon">c<sub>15</sub></font> <a href="binop_1.html#K1">.</a> <font color="Maroon">c<sub>16</sub></font>,1 = 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_1.html#K1">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>14</sub></font> <a href="binop_1.html#K1">.</a> <font color="Maroon">c<sub>16</sub></font>,<font color="Maroon">c<sub>4</sub></font></span>)</span>
<b>by </b><i><a class="txt" href="topalg_3.html#E1"><i><font color="Green">Lemma1</font></i></a>, <a class="ref" href="binop_1.html#T30">BINOP_1:30</a></i>
<br/>.= 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_2.html#K3">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>11</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>16</sub></font></span>)</span>
<b>by </b><i><a class="txt" href="topalg_3.html#E1:33"><i><font color="Green">E13</font></i></a>, <a class="ref" href="borsuk_6.html#D13">BORSUK_6:def 13</a></i>
<br/>.= 
<font color="Maroon">c<sub>13</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>16</sub></font>
<b>by </b><i><a class="txt" href="topalg_3.html#E3:33"><i><font color="Green">E15</font></i></a>, <a class="ref" href="funct_2.html#T21">FUNCT_2:21</a></i>
;<br/>

<b>let </b><font color="Maroon">c<sub>17</sub></font> be   <a href="pre_topc.html#NM2">Point</a> of <a href="borsuk_1.html#K20">I[01]</a> ;<br/>

<b>thus </b><font color="Maroon">c<sub>15</sub></font> <a href="binop_1.html#K1">.</a> 0,<font color="Maroon">c<sub>17</sub></font> = 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_1.html#K1">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>14</sub></font> <a href="binop_1.html#K1">.</a> <font color="Maroon">c<sub>3</sub></font>,<font color="Maroon">c<sub>17</sub></font></span>)</span>
<b>by </b><i><a class="txt" href="topalg_3.html#E1"><i><font color="Green">Lemma1</font></i></a>, <a class="ref" href="binop_1.html#T30">BINOP_1:30</a></i>
<br/>.= 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>8</sub></font>
<b>by </b><i><a class="txt" href="topalg_3.html#E1:33"><i><font color="Green">E13</font></i></a>, <a class="ref" href="borsuk_6.html#D13">BORSUK_6:def 13</a></i>
;<br/>

<b>thus </b><font color="Maroon">c<sub>15</sub></font> <a href="binop_1.html#K1">.</a> 1,<font color="Maroon">c<sub>17</sub></font> = 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_1.html#K1">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>14</sub></font> <a href="binop_1.html#K1">.</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>17</sub></font></span>)</span>
<b>by </b><i><a class="txt" href="topalg_3.html#E1"><i><font color="Green">Lemma1</font></i></a>, <a class="ref" href="binop_1.html#T30">BINOP_1:30</a></i>
<br/>.= 
<font color="Maroon">c<sub>7</sub></font> <a href="funct_2.html#K3">.</a> <font color="Maroon">c<sub>9</sub></font>
<b>by </b><i><a class="txt" href="topalg_3.html#E1:33"><i><font color="Green">E13</font></i></a>, <a class="ref" href="borsuk_6.html#D13">BORSUK_6:def 13</a></i>
;<br/>


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