1 1 vote Output of a linear system with input $x(t)$ is given by \[ y(t)=\int_{-\infty}^{\infty} h(t, \tau) x(\tau) . \] The system is time invariant if $h(t, \tau)=h(t-\tau)$ $h(t, \tau)=h(\tau)$ $h(t, \tau)=h(t)$ $h(t, \tau)=$ constant $h(t, \tau)$ is a continuous function of $t$ Continuous-time Signals tifr2010 continuous-time-signals linear-time-invariant-systems signals-and-systems + – admin 436 views answer comment Share Follow Add Sync Questions Print 0 reply Please log in or register to add a comment.