MathGroup Archive 2008

[Date Index] [Thread Index] [Author Index]

Search the Archive

Equations system with zero

  • To: mathgroup at
  • Subject: [mg91360] Equations system with zero
  • From: Miguel <mibelair at>
  • Date: Mon, 18 Aug 2008 03:36:41 -0400 (EDT)

Hi alll,

Let the following equations system for x, y Reals


Mathematica 6.0.1 yields no solution. But the solutions exist. They
are four solutions

x=0, y=+-Sqrt[1/3]
y=0, x=+-1

Mathematica first simplifying y/(9y) -> 1/9 and it compare with 0/(5x) -
> and yiels False and it stops the process. Is this correct?.

In my opinion, the correct process would be
5xy=0 ----> x=0 or y=0

and substitution in the second equation.

  • Prev by Date: Re: Locate palette at top edge of screen?
  • Next by Date: Version 2.4 of the Mathematica Baseball package is available
  • Previous by thread: Re: About the error message Indeterminate
  • Next by thread: Re: Equations system with zero