Line 11: Line 11:
  
 
== Part C.3 ==
 
== Part C.3 ==
 
<math> \left[ \begin{array}{ccc}
 
1 & 0 & 1 \\
 
0 & 1 & 0 \\
 
4 & 0 & 1 \end{array} \right] \times
 
\left[ \begin{array}{ccc}
 
a & b & c \\
 
d & e & f \\
 
g & h & i \end{array} \right] =
 
\left[ \begin{array}{ccc}
 
2 & 0 & 0 \\
 
0 & 1 & 0 \\
 
0 & 0 & 3 \end{array} \right]
 
</math>
 

Revision as of 13:53, 19 September 2008

Application of Linearity

Part C.1

If Bob knows the secret matrix used to encrypt the message, He can simply take the inverse of that matrix and multiply the encrypted vector by the inverted matrix.

Part C.2

Yes she can just solve the system of equations represented by the matrix, but in general it is easier to just use matrices to solve such equations.


Part C.3

Alumni Liaison

Abstract algebra continues the conceptual developments of linear algebra, on an even grander scale.

Dr. Paul Garrett