Re: "Reduce" returns repeated solutions!
- To: mathgroup at smc.vnet.net
- Subject: [mg46348] Re: [mg46333] "Reduce" returns repeated solutions!
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Mon, 16 Feb 2004 08:59:49 -0500 (EST)
- References: <200402150319.WAA06255@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On 15 Feb 2004, at 04:19, Pedro L wrote: > Hello mathgroup, > > > I would like to know why when I write: > > Reduce[(x >= y \[Implies] 2x <= 3y) && Abs[x] < 5 && Abs[y] < 5, {x, > y}, Integers] > I obtain repeated solutions. > > > > I obtain a lot of solutions like: x == -4 && y == -3 ... > > But many of them appear repeated. > In this case I obtain x == -4 && y == -1 two times. > > How do you "simplify" the list of solutions? > > Thanks in advance. > > Pedro L. (Spain) > > You can use Union Length[l = Reduce[Implies[x >= y, 2*x <= 3*y] && Abs[x] < 5 && Abs[y] < 5, {x, y}, Integers]] 78 Length[Union[l]] 43 or Simplify: Length[Simplify[l]] 43 Andrzej Kozlowski Chiba, Japan http://www.mimuw.edu.pl/~akoz/
- References:
- "Reduce" returns repeated solutions!
- From: Pedro L <pedrito6@softhome.net>
- "Reduce" returns repeated solutions!