📄 slide0045.htm
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<div style='text-align:right;position:absolute;top:92.0%;left:72.65%;
width:18.91%;height:3.0%'><span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";font-size:58%;mso-field-code:meta16'>42</span><span
style='font-size:58%;mso-special-format:lastCR;display:none'> </span></div>
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<div style='position:absolute;top:3.75%;left:5.05%;width:92.69%;height:6.25%'><span
style='font-family:黑体;mso-ascii-font-family:黑体;mso-fareast-font-family:黑体;
font-size:133%'>3.2<span style="mso-spacerun: yes"> </span>合一</span> </div>
<div style='position:absolute;top:10.75%;left:5.05%;width:92.69%;height:4.75%'> </div>
<div style='position:absolute;top:15.5%;left:5.05%;width:111.23%;height:5.25%'><span
style='font-family:仿宋_GB2312;mso-fareast-font-family:仿宋_GB2312'>替换</span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>:<span
style="mso-spacerun: yes"> </span></span>一个形如<span style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman"'> </span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><i>{x1/t1,
x2/t2, …, xn/tn}</i></span><span lang=EN-US style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-language:ZH-CN'> </span>的有限集合<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>,</span>表示以<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><i>
ti</i></span><span lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:
"Times New Roman";mso-fareast-language:ZH-CN'> </span>代替 </div>
<div style='position:absolute;top:20.75%;left:5.05%;width:106.17%;height:5.25%'><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><span
style="mso-spacerun:
yes"> </span></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>xi</i></span><span lang=EN-US style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman";mso-fareast-language:
ZH-CN'> </span>的结果<span style='font-family:"Times New Roman";mso-ascii-font-family:
"Times New Roman"'>, </span>其中<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'> </span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>xi</i></span><span lang=EN-US style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman";mso-fareast-language:
ZH-CN'> </span>是不同变元<span style='font-family:"Times New Roman";mso-ascii-font-family:
"Times New Roman"'>, </span><span lang=EN-US style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-language:ZH-CN'><i>ti</i></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'> </span>是项<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'>, </span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>xi </i></span>不在<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'><i> ti</i></span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'> </span>中出现<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'>. </span></div>
<div style='position:absolute;top:26.25%;left:5.05%;width:108.42%;height:5.25%'><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><span
style="mso-spacerun:
yes"> </span></span>当<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>
</span><span lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:
"Times New Roman";mso-fareast-language:ZH-CN'><i>ti </i></span>是闭项时<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>,
</span>称为<span style='font-family:仿宋_GB2312;mso-fareast-font-family:仿宋_GB2312'>基替换</span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>.</span>没有元素的替换称为空替换<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>,
</span></div>
<div style='position:absolute;top:31.0%;left:5.05%;width:92.69%;height:5.75%'><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><span
style="mso-spacerun:
yes"> </span></span>记为<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>
</span><span style='font-family:Symbol;mso-char-type:symbol'>e</span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>.</span> </div>
<div style='position:absolute;top:36.75%;left:5.05%;width:92.69%;height:5.25%'><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><span
style="mso-spacerun:
yes">
</span></span><span style='font-family:"Times New Roman";mso-ascii-font-family:
"Times New Roman"'><i>{x/A, y/f(B), z/w}</i></span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'> </span></div>
<div style='position:absolute;top:42.25%;left:5.05%;width:92.69%;height:5.25%'><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><span style="mso-spacerun:
yes">
</span></span><span lang=EN-US style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-language:ZH-CN'><i>{x/g(y),
y/f(x)}</i></span><span lang=EN-US style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-language:ZH-CN'> </span></div>
<div style='position:absolute;top:48.0%;left:5.05%;width:92.69%;height:4.75%'><span
lang=EN-US style='mso-fareast-language:ZH-CN;display:none'> </span></div>
<div style='position:absolute;top:52.5%;left:5.05%;width:108.61%;height:5.75%'>设<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>
</span><span style='font-family:Symbol;mso-char-type:symbol'><i>q</i></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><i>=</i></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>
</span><span style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><i>{x1/t1,
x2/t2, …, xn/tn}</i></span><span lang=EN-US style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-language:ZH-CN'> </span>是一个替换<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>,
</span><span lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:
"Times New Roman";mso-fareast-language:ZH-CN'><i>E</i></span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'> </span>是一个表达式<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'>, </span>将<span style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman"'> </span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>E</i></span><span lang=EN-US style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman";mso-fareast-language:
ZH-CN'> </span></div>
<div style='position:absolute;top:57.75%;left:5.05%;width:104.3%;height:5.75%'>中变元<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><i>
xi</i></span><span lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:
"Times New Roman";mso-fareast-language:ZH-CN'> </span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>(i=1,2, …,n)</i></span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'> </span>分别用<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'> </span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>ti </i></span>替换<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'>, </span>记为<span style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman"'> </span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>E</i></span><span lang=EN-US style='font-family:
Symbol;mso-fareast-language:ZH-CN;mso-char-type:symbol'><i>q</i></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'>, </span>称为<span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman"'> </span><span lang=EN-US
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><i>E</i></span><span lang=EN-US style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman";mso-fareast-language:
ZH-CN'> </span>的一个 </div>
<div style='position:absolute;top:63.5%;left:5.05%;width:92.69%;height:5.25%'>特例<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>. </span></div>
<div style='position:absolute;top:68.75%;left:5.05%;width:92.69%;height:5.25%'><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">
</span></span> <span lang=EN-US style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-language:ZH-CN'><i>p(x,x,y,v){x/A,y/f(B),z/w}=p(A,A,f(B),v}</i></span><span
lang=EN-US style='mso-fareast-language:ZH-CN;display:none'> </span></div>
<div style='position:absolute;top:74.0%;left:5.05%;width:92.69%;height:5.25%'><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-language:ZH-CN'><span style="mso-spacerun: yes"> </span> </span></div>
<div style='position:absolute;top:79.5%;left:5.05%;width:107.3%;height:5.25%'><span
style='font-family:仿宋_GB2312;mso-fareast-font-family:仿宋_GB2312'>合一</span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>:<span
style="mso-spacerun: yes"> </span></span>确定两个公式通过对他们之中的变元进行替换变成同一 </div>
<div style='position:absolute;top:84.75%;left:5.05%;width:92.69%;height:5.25%'><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'><span
style="mso-spacerun:
yes"> </span></span>公式的过程<span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman"'>. </span></div>
<div style='position:absolute;top:90.5%;left:5.05%;width:92.69%;height:4.75%'><span
style='mso-special-format:lastCR;display:none'> </span></div>
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