Re: Re: Re: Getting rid of the symbol -> after finding the root

*To*: mathgroup at smc.vnet.net*Subject*: [mg39405] Re: [mg39360] Re: [mg39326] Re: Getting rid of the symbol -> after finding the root*From*: Jan Mangaldan <hokenjan at yahoo.com>*Date*: Fri, 14 Feb 2003 03:18:46 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

I have been seeing this question a lot of times. Why don't we set up a list of FAQ's about Mathematica? Jan M. (^_^) Kirk Reinholtz <kirk.reinholtz at jpl.nasa.gov> wrote: You'll want to read about "Rule" in the help browser: Understanding this construct is critical to your understanding of Mathematica. When you have an output like a->3, you can use that rule to (say) replace all instances of "a" in an expression with "3". For example, a x + 7 /. {a->3} will replace the "a" with "3". This operation is quite general, vastly more powerful than you might imagine by this simple example. If you just want to "remove" the "->", then r={a->3} a/.r will do as you wish. "Mostaghel, Naser" wrote: > > Dear Friends, > I need to use the root of a simple equation in subsequent operations. > After extracting the root, it comes in the form ->root. I have not been > able to get rid of the symbol -> . > > Can someone help? > > Thanks, > > Naser Mostaghel > Professor, Civil Engineering > T: (419) 530-8131 > F: (419) 530-8116 > E: nmostag at utnet.utoledo.edu