Re: Defining a function
- To: mathgroup at smc.vnet.net
- Subject: [mg28588] Re: Defining a function
- From: "Paul Lutus" <nospam at nosite.com>
- Date: Mon, 30 Apr 2001 03:02:01 -0400 (EDT)
- References: <9cfrlf$gmd@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"Jesse Marder" <yarblocks at yahoo.de> wrote in message news:9cfrlf$gmd at smc.vnet.net... > Hello. > > I have for example: > > a = x + y and > b = x*y > > whats the procedure to express b as a function of a in Mathematica? This is a simple algebra problem, and you cannot consistently express b as a function of a. They are unrelated. Mathematica cannot get around this simple fact. Consider x = 0, y = 3. a = 3, b = 0 Consider x = 0, y = -3. a = -3, b = 0. Consider x = -3, y = -3. a = -6, b = 9. Consider x = 3, y = 3. a = 6, b = 9. There's no relation. -- Paul Lutus www.arachnoid.com