On 17/08/2012 9:43 PM, Luis wrote: > I think there is some reply to this questionh in 2007, but I cannot > read it. > See the threads starting - http://www.math.utexas.edu/pipermail/maxima/2007/008243.html - http://www.math.utexas.edu/pipermail/maxima/2012/028211.html