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Re: question about simplify function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96949] Re: question about simplify function
  • From: Pillsy <pillsbury at gmail.com>
  • Date: Sat, 28 Feb 2009 06:40:04 -0500 (EST)
  • References: <go8i2m$l5e$1@smc.vnet.net>

On Feb 27, 6:16 am, zxcv_... at hotmail.com wrote:
> This seems like a basic question, but I can't see the answer: Why
> doesn't either the Simplify or FullSimplify function transform the
> expression x/(xy) into 1/y? When I substitute a specific value in for
> x, the simplification occurs as expected, e.g., 4/(4y) transforms to 1/
> y. Puzzling.

Because if you type "xy" without a space between the two letters, Mathematica 
interprets it as single variable named "xy", which it obviously can't
simply.

x/(x y)

or

x/(x*y)

will do what you want.

Personally, I don't think the convenience of using a space for
multiplication has turned out to be worth the trouble, but clearly WRI
disagrees with me.

Cheers,
Pillsy


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