Le 27/07/2013 18:05, Raymond Toy a ?crit : Hi, > In maxima, %gamma is Euler's constant, 0.577. Change %gamma to > something else. When I do this (changing %gamma to %g), I get the > solution Thank you very much. Indeed when I change %gamma I get the correct solution. Regards -- Jean-Fran?ois MAUREL PIMECA http://www.pimeca.com