Heaviside step function
From specialfunctionswiki
The Heaviside step function is $$u_c(t) = \left\{ \begin{array}{ll} 0 &; t < c \\ 1 &; t \geq c. \end{array} \right.$$
The Heaviside step function is $$u_c(t) = \left\{ \begin{array}{ll} 0 &; t < c \\ 1 &; t \geq c. \end{array} \right.$$
