A	State-transition averaged matrix for a full switching interval
B	Input averaged matrix for a full switching interval
C	Output averaged matrix for a full switching interval
E	Input-output averaged matrix for a full switching interval
D	Duty cycle of the pulse width modulated (PWM) switch control input
$A_1$	State-transition matrix during the first subinterval $T=D{T}_s$
	where switch $T_1$ is closed and switch $T_2$ open,
	see Figure 3 and Figure 4
$B_1$	Input matrix during the first subinterval $T=D{T}_s$
	where switch $T_1$ is closed and switch $T_2$ open,
	see Figure 3 and Figure 4
$C_1$	Output matrix during the first subinterval $T=D{T}_s$
	where switch $T_1$ is closed and switch $T_2$ open,
	see Figure 3 and Figure 4