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Separating constants from nonconstants in an expression

• To: mathgroup at smc.vnet.net
• Subject: [mg52423] Separating constants from nonconstants in an expression
• From: Nicolas Girard <nicolas.girard at strasbourg.fr>
• Date: Fri, 26 Nov 2004 06:20:29 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

Hi,
given any expression like

  expr := (4 Pi k1 x k2 y)/(12 k3 t k4 u)

and knowing that k1...k4 are constants, how could I separate these terms
from the non constant ones, i.e. ending up with

  Pi k1 k2   x y
  -------- . ---
  3 k3 k4    t u

? I've looked into the manual & browsed this newsgroup, but didn't find a
clue...

Many thanks in advance !
Nicolas
 

• Follow-Ups:
  • Re: Separating constants from nonconstants in an expression
    • From: yehuda ben-shimol <benshimo@bgu.ac.il>