Re: Help with Reduce Command.

*To*: mathgroup at smc.vnet.net*Subject*: [mg73695] Re: [mg73640] Help with Reduce Command.*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Sat, 24 Feb 2007 02:31:15 -0500 (EST)*References*: <200702230945.EAA18009@smc.vnet.net>

On 23 Feb 2007, at 10:45, nikki_74 wrote: > Hi, > > I am solving a set of multi-variate polynomial equations using > REDUCE command. As I understand, it solves for all variables in the > given equations. However, I want it to provide solutions for just > one of the variables. > I know that the SOLVE command can do this. But I need to specify a > Modulus value as well ( which can be done in REDUCE but not SOLVE). > > Is there a way around this? > > Thanks. > Your assertion about Solve dis not true. You can Solve equations modulo a number as follows: Solve[{x^2 + y^2 == 3, x^2 - y == 1, Modulus == 5}, {x, y}, Mode -> Modular] {{Modulus -> 5, y -> 3, x -> 2}, {Modulus -> 5, y -> 3, x -> 3}} However, whether you can get a satisfactory "solution for one variable" in modular mode depends on your specific system of equations, since it is not always clear what is meant by such a "solution". Andrzej Kozlowski

**References**:**Help with Reduce Command.***From:*nikki_74 <namratashekar@rediffmail.com>