
Re: Another question about Factor
Posted:
Nov 22, 2012 7:02 PM


On 11/22/2012 5:31 PM, Tang Laoya wrote: > Dear Dr. M. Abbasi,
Please just call me Nasser. I am not a Dr, just a busy student.
> > Thank you very much for your kindly reply. I wish mathematica >give me an express which I can code by Fortran with smallest >number of floating operations. For example, if I have: > > bb1 = Det[{{1, 1, 1}, {y2, y3, y4}, {z2, z3, z4}}]; > > the result by mathematica is: > y3 z2  y4 z2  y2 z3 + y4 z3 + y2 z4  y3 z4 > > I wish it output the result like this: > z2 (y3y4)  z3 (y2y4) + z4 (y2y3) > > > What should I do? >
Try
 HornerForm[Det[{{1, 1, 1}, {y2, y3, y4}, {z2, z3, z4}}], {z2, z3, z4}] 
(y3  y4)*z2 + (y2 + y4)*z3 + (y2  y3)*z4
Nasser

