	\begin{alignat}{4}
		&\frac{\partial }{\partial t} f(x,t,v) + v\cdot \nabla_x f(x,t,v) = \L(f){(x,t,v)} - \sigma{(x,v)} f{(x,t,v)}\,\label{eq:chemotaxis}\\%,\quad (x,t,v)\in\rr^3\times V\times[0,T]\nonumber \\
		&f(x,t=0,v) = \phi(x,v)\label{eq:initialdata}%\in C_{c,+}^{\infty} %L^{1}\cap L^{\infty}
	\end{alignat}
