Linear time invariant and linear time-varying systems

1. What is the difference between a time invariant and a time varying system?
2. What is linear time invariant and linear time variant system?
3. What do you mean by linear time invariant system?
4. What is time variant and time-invariant system examples?

What is the difference between a time invariant and a time varying system?

A system is said to be time invariant if the response of the system to an input is not a function of time. On the other hand a system is time variant if the response to an input alters with time i.e. the system has varying response to the same input at different instants of time.

What is linear time invariant and linear time variant system?

Linear systems are systems whose outputs for a linear combination of inputs are the same as a linear combination of individual responses to those inputs. Time-invariant systems are systems where the output does not depend on when an input was applied.

What do you mean by linear time invariant system?

In system analysis, among other fields of study, a linear time-invariant (LTI) system is a system that produces an output signal from any input signal subject to the constraints of linearity and time-invariance; these terms are briefly defined below.

What is time variant and time-invariant system examples?

A system is called time invariant if its output , input characteristics dos not change with time. e.g.y(n)=x(n)+x(n-1) A system is called time variant if its input, output characteristics changes with time. e.g.y(n)=x(-n).