MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive


  • To: mathgroup at
  • Subject: [mg77898] Substitutions
  • From: SK <skhushrushahi at>
  • Date: Tue, 19 Jun 2007 06:41:15 -0400 (EDT)

     Ive had this problem come up quite often and I was wondering if
     someone could help me. I have expressions that are quite complex
     what I would like to do is define a new non-dimensional parameter
     would have many of the variables of the expression clumped in it
     that would reduce the complexity of my expression. I have used /.
     Ive realized that unless what I want to replace is of the exact
     fractional form it wont substitute.
     This is my problem
     and say I want to rewrite this equation using new non-dimensional
parameters such
     Another example of this is I have an equation (
shahriar/Public/3.bmp ) and I want to replace Bx/=CE=BC0 with a new
variable say B_x Mathematica wont do it unless it is exactly like the
form Bx/=CE=BC0 so a rule like Bx/=CE=BC0 ->B_x is useless in dealing with =
     If someone would help, i would be very grateful. Thanks

  • Prev by Date: Re: Indefinate integrals, erroneus Natural log?
  • Next by Date: Re: Three problems with V. 6.0
  • Previous by thread: Re: Re: PrimePi and limit of argument
  • Next by thread: Re: Substitutions