This function needs oxasir --- rationalRoots2 This function is defined in intw.sm1 and requires oxasir.sm1 and ox_asir server. Example 1: [[(-3 x^2 Dy-2 y Dx) (2 x Dx+3 y Dy+6)] [(x) (y)] [(x) -1 (Dx) 1 (y) -2 (Dy) 2]] wbfRoots Example 2: [[[(0) (x^2 Dx+x)] [(Dx^2+x Dx^3) (0)]] [(x)] [(x) -1 (Dx) 1]] wbfRoots

Nobuki Takayama 2020-11-24