CONV Convolution and polynomial multiplication.
    C = CONV(A, B) convolves vectors A and B.  The resulting
    vector is length LENGTH(A)+LENGTH(B)-1.
    If A and B are vectors of polynomial coefficients, convolving
    them is equivalent to multiplying the two polynomials.
 
    See also DECONV, CONV2, CONVN, FILTER and, in the Signal
    Processing Toolbox, XCORR, CONVMTX.