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	<title>Superposition principle - Revision history</title>
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	<updated>2026-05-13T18:32:58Z</updated>
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		<id>http://ricefriedegg.com:80/mediawiki/index.php?title=Superposition_principle&amp;diff=761&amp;oldid=prev</id>
		<title>Rice: Created page with &quot;Category:Differential Equations  The &#039;&#039;&#039;superposition principle&#039;&#039;&#039; is actually a broad category of principles that widely apply to homogeneous linear stuff. I&#039;ll discuss this in the context of differential equations.  Consider a linear operator on functions, L  &lt;math&gt; L[y]=y&#039;&#039;+py&#039;+qy &lt;/math&gt;  It can be (pretty easily) proven that  &lt;math&gt; L[y_1+y_2]=L[y_1]+L[y_2] &lt;/math&gt;  and  &lt;math&gt; L[cy]=cL[y] &lt;/math&gt;  Then, given two homogeneous solutions  &lt;math&gt; L[y_1]=L[y_2]=...&quot;</title>
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		<updated>2024-05-18T00:34:09Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&lt;a href=&quot;/mediawiki/index.php/Category:Differential_Equations&quot; title=&quot;Category:Differential Equations&quot;&gt;Category:Differential Equations&lt;/a&gt;  The &amp;#039;&amp;#039;&amp;#039;superposition principle&amp;#039;&amp;#039;&amp;#039; is actually a broad category of principles that widely apply to &lt;a href=&quot;/mediawiki/index.php/Homogeneous&quot; title=&quot;Homogeneous&quot;&gt;homogeneous&lt;/a&gt; linear stuff. I&amp;#039;ll discuss this in the context of differential equations.  Consider a linear operator on functions, L  &amp;lt;math&amp;gt; L[y]=y&amp;#039;&amp;#039;+py&amp;#039;+qy &amp;lt;/math&amp;gt;  It can be (pretty easily) proven that  &amp;lt;math&amp;gt; L[y_1+y_2]=L[y_1]+L[y_2] &amp;lt;/math&amp;gt;  and  &amp;lt;math&amp;gt; L[cy]=cL[y] &amp;lt;/math&amp;gt;  Then, given two homogeneous solutions  &amp;lt;math&amp;gt; L[y_1]=L[y_2]=...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[[Category:Differential Equations]]&lt;br /&gt;
&lt;br /&gt;
The &amp;#039;&amp;#039;&amp;#039;superposition principle&amp;#039;&amp;#039;&amp;#039; is actually a broad category of principles that widely apply to [[homogeneous]] linear stuff. I&amp;#039;ll discuss this in the context of differential equations.&lt;br /&gt;
&lt;br /&gt;
Consider a linear operator on functions, L&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;&lt;br /&gt;
L[y]=y&amp;#039;&amp;#039;+py&amp;#039;+qy&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
It can be (pretty easily) proven that&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;&lt;br /&gt;
L[y_1+y_2]=L[y_1]+L[y_2]&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
and&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;&lt;br /&gt;
L[cy]=cL[y]&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Then, given two homogeneous solutions&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;&lt;br /&gt;
L[y_1]=L[y_2]=0&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
We can prove that&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;&lt;br /&gt;
L[c_1y_1+c_2y_2]=0&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
And by extension, we can also find the solutions of nonhomogeneous solutions with one particular solution and the two homogeneous solutions.&lt;/div&gt;</summary>
		<author><name>Rice</name></author>
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