Revision as of 12:23, 16 September 2008 by Drecord (Talk)

Invertible Systems

A system is invertible if distinct inputs yield distinct outputs.

Invertible System:
y(t) = $ \frac{3*x(t) + 8}{1} $
x(t) = $ \frac{y(t) - 8}{3} $
x(t) -> |Sys 1| -> y(t) -> |Sys 2| -> x(t)
The two equations are inverses of each other.
Noninvertible System:
y(t) = $ t^4 $

x(t) = $ t $     ->     |Sys|     ->     y(t) = $ t^4 $
 
x(t) = $ -t $    ->     |Sys|     ->     y(t) = $ t^4 $
The System is not invertible because for a given set of inputs you cannot differentiate which of the output will result.

Alumni Liaison

Prof. Math. Ohio State and Associate Dean
Outstanding Alumnus Purdue Math 2008

Jeff McNeal