A Question about Expression Simplication
- To: mathgroup at smc.vnet.net
- Subject: [mg31553] A Question about Expression Simplication
- From: "Lewis" <ylcsk at yahoo.com>
- Date: Sun, 11 Nov 2001 00:34:38 -0500 (EST)
- Organization: Hong Kong University of Science and Technology
- Sender: owner-wri-mathgroup at wolfram.com
Hi MathGroup,
I am a beginner to Mathematica. Please help me solve the following problem.
I am trying to manipulate expressions like:
Sum[x_i, {i,1,T}] - x_2 or Sum[x_i, {i,1,T}] - Sum[x_i, {i,1,2,T}]
I want to keep the upper limit as T, not any specific numeric value. I
tried to use Simplify as in
Simplify[Sum[x_i, {i,1,T}] - x_2]
But the x_2 term doesn't get cancelled out. I also tried:
Simplify[Sum[x_i, {i,1,T}] - x_2, T>2],
but it didn't seem to work either. So I am wondering if the simplication
only works when I specify the value for T. Any advice, please?
Thank you very much!
Best,
Lewis.