v_first           438 src/brusselator_algo.h     void calculate_velocity(It1 xn_first, It1 xn_last, It1 xo_first, It2 v_first){
v_first           440 src/brusselator_algo.h       for(; xn_first != xn_last; ++xn_first, ++xo_first, ++v_first)
v_first           441 src/brusselator_algo.h 	*v_first = (*xn_first - *xo_first)/dT;