_F_a_s_t _C_o_n_v_o_l_u_t_i_o_n
	
	     convolve(a, b, conj=FALSE)
	
	_A_r_g_u_m_e_n_t_s:
	
	         a,b : the sequences to be convolved.
	
	        conj : logical, if TRUE the forward transform of b
	               is conjugated before back-transformation.
	
	_D_e_s_c_r_i_p_t_i_o_n:
	
	     convolve uses the Fast Fourier Transform to compute the
	     convolution of the sequences given as its arguments.
	
	     Complex conjugation is useful when computing autoco-
	     variances and autocorrelations by fast convolution.
	
	_R_e_f_e_r_e_n_c_e_s:
	
	     Brillinger, D. R. (1981).  Time Series: Data Analysis
	     and Theory, Second Edition.  San Francisco: Holden-Day.
	
	_S_e_e _A_l_s_o:
	
	     fft, nextn.