Re: Problem with Inequalities
- To: mathgroup at smc.vnet.net
- Subject: [mg29706] Re: Problem with Inequalities
- From: "Orestis Vantzos" <atelesforos at hotmail.com>
- Date: Wed, 4 Jul 2001 03:08:30 -0400 (EDT)
- Organization: National Technical University of Athens, Greece
- References: <9hs0qo$br4$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Major misunderstanding ahead: a>b tells Mathematica nothing about a and b; you actually question Mathematica whether a is greater than b...if a and b are undefined then you get your inequality back: In: a>b Out: a>b If you want to "teach" Mathematica that a IS GREATER than b then do the following: a>b^=True This defines an upvalue for the symbol a and sets a>b equal to True. Note: I can't quite convince myself that this is "good" programming practice. Apply at your own risk... Orestis "Axel Dreher" <Mail at Axel-Dreher.de> wrote in message news:9hs0qo$br4$1 at smc.vnet.net... > Hi, > I'm desperately searching for help on my inequality question. > How can I check for the truth of inequalities when I use variables > instaed of numeric values? > > For example: a>b;TrueQ[a>b] > does yield 'false' and for example a=1;b=0.5;TrueQ[a>b] yields 'True'. > How do I have to tell the programm, that it should use a>b? > > Thanks for your help...... > > Axel > > > > > >