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A system is called linear if for any inputs, x1 & x2, yielding outputs y1 & y2 the response to  
 
A system is called linear if for any inputs, x1 & x2, yielding outputs y1 & y2 the response to  
  
a*x1 + b*x2 is a*y1 + b*y2.
+
a*x1 + b*x2 is equal to  a*y1 + b*y2.
  
  
Line 10: Line 10:
 
The system below
 
The system below
  
 
+
<pre>
x1 => system => *a  
+
x1 => system => *a \
 
                     +  => y(t)
 
                     +  => y(t)
x2 => system => *b  
+
x2 => system => *b /
 
+
</pre>
  
 
equals th system below
 
equals th system below
  
 
+
<pre>
x1*a => system  
+
x1*a => system \
 
                 +  => y(t)
 
                 +  => y(t)
x2*b => system
+
x2*b => system /
 +
</pre>

Latest revision as of 15:58, 11 September 2008

A system is called linear if for any inputs, x1 & x2, yielding outputs y1 & y2 the response to

a*x1 + b*x2 is equal to a*y1 + b*y2.



i.e

The system below

x1 => system => *a \
                     +  => y(t)
x2 => system => *b /

equals th system below

x1*a => system \
                 +  => y(t)
x2*b => system /

Alumni Liaison

Basic linear algebra uncovers and clarifies very important geometry and algebra.

Dr. Paul Garrett