Re: Re: can anyone solve this equation?

*To*: mathgroup at smc.vnet.net*Subject*: [mg58186] Re: [mg58159] Re: can anyone solve this equation?*From*: Paul Abbott <paul at physics.uwa.edu.au>*Date*: Tue, 21 Jun 2005 06:03:20 -0400 (EDT)*References*: <d8rhj9$i7n$1@smc.vnet.net> <200506200952.FAA26966@smc.vnet.net> <acbec1a4050620141519a78e91@mail.gmail.com>*Sender*: owner-wri-mathgroup at wolfram.com

>I agree that subscripted expressions look better. However, I run into >many instances where Mathematica does not treat subscripted variables >as symbols. Symbolize in Utilities`Notation` is designed to do exactly that (and in some display formats, such as InputForm, it automatically actually uses \[UnderBracket] anyway). >Notation commands with appropriate pattern matching can >take care of converting the unbracketed expressions to more easily >readable ones, but I didn't want to complicate the situation any more >than it already was. Indeed -- to even read and digest your expression I used pattern-matching several times to reduce the expression to something more manageable. Cheers, Paul >Sincere thanks to both Paul and Pratik for the solutions; I will be >testing them shortly. > >On 6/20/05, Paul Abbott <paul at physics.uwa.edu.au> wrote: >> In article <d8rhj9$i7n$1 at smc.vnet.net>, >> Chris Chiasson <chris.chiasson at gmail.com> wrote: >> >> > Can anyone solve the following equation (for theta_4)? >> >> Essentially, you are solving the equation >> >> FullSimplify[Solve[a - Cos[t] - Sqrt[R^2 - Sin[t]^2] == x, t]] >> >> where x = 2 n rhs/d is a constant multiple of your right-hand side, rhs, >> t is theta_4, and a = R + 2/(c - 1) + 1. This is, of course, trivial. I >> expect that Solve struggles with your expression because of the length >> and/or complexity of rhs. >> >> To me, using \[UnderBracket] makes your input expression unreadable. >> Only an engineer would work with such expressions! >> >> Personally, I like using subscripted expressions in Mathematica. They >> are not without their difficulties and subtleties -- but are preferable >> to using \[UnderBracket]. >> >> Cheers, >> Paul >> >> -- >> Paul Abbott Phone: +61 8 6488 2734 >> School of Physics, M013 Fax: +61 8 6488 1014 >> The University of Western Australia (CRICOS Provider No 00126G) >> AUSTRALIA http://physics.uwa.edu.au/~paul >> http://InternationalMathematicaSymposium.org/IMS2005/ >> >> > > >-- >Chris Chiasson >http://chrischiasson.com/ >1 (810) 265-3161

**References**:**Re: can anyone solve this equation?***From:*Paul Abbott <paul@physics.uwa.edu.au>