Mathematica 9 is now available
Student Support Forum
-----
Student Support Forum: 'Mathematica evaluation not completing' topicStudent Support Forum > General > "Mathematica evaluation not completing"

< Previous Comment | Next Comment >Help | Reply To Comment | Reply To Topic
Author Comment/Response
Bill Simpson
07/30/12 11:37am

This doesn't answer why SolveAlways isn't working for you in this particular case, but for this particular problem

Simplify[Reduce[(a+b)(1-r^2)+c r Sqrt[1-r^2]==0, {r}]]

instantly returns

(a+b==0 and (c==0 or 1+r==0 or r==0 or r==1))
or two other solutions involving complex numbers.

Sometimes in Mathematica you can spend hours or days fighting with it trying to get it to do something or you can just give up on that and use another method.

URL: ,

Subject (listing for 'Mathematica evaluation not completing')
Author Date Posted
Mathematica evaluation not completing Dean 07/29/12 12:51pm
Re: Mathematica evaluation not completing Bill Simpson 07/30/12 11:37am
Re: Re: Mathematica evaluation not completing Dean 07/31/12 11:52pm
Re: Mathematica evaluation not completing Forum Modera... 08/01/12 11:27am
Re: Re: Mathematica evaluation not completing Dean 08/02/12 4:11pm
< Previous Comment | Next Comment >Help | Reply To Comment | Reply To Topic