Re: Simultaneous difference equation
- To: mathgroup at smc.vnet.net
- Subject: [mg30613] Re: [mg30600] Simultaneous difference equation
- From: Tomas Garza <tgarza01 at prodigy.net.mx>
- Date: Fri, 31 Aug 2001 04:09:38 -0400 (EDT)
- References: <200108300751.DAA01819@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Your problem is discussed in the Help|Add-ons|Standard Packages|DiscreteMath|RSolve. As a novice user you are probably unaware that the underscore "_" (called "Blank") has a specific meaning in Mathematica: it is a pattern object that can stand for any expression. So you must start by rewriting your coefficients and throw out all the blanks therein. Tomas Garza Mexico City ----- Original Message ----- From: "Shusaku Yamamoto" <shusaku.yamamoto at buseco.monash.edu.au> To: mathgroup at smc.vnet.net Subject: [mg30613] [mg30600] Simultaneous difference equation > Hello, I have just started using (or more appropriately trying to use) > Mathematica. As you expect, I have a problem. I would like to know > Mathematica code for solving simultaneous difference eqation; for > example: > > a_11*x(t)+a_12*y(t)=a_13*x(t-1)+a_14*y(t-1)+k_1 > a_21* x(t)+a_22*y(t)=a_23*x(t-1)+a_24*y(t-1)+k_2 > > Or, in matrix notation, > > A_1*Y(t)=A_2*Y(t-1)+K > > t denotes time t, and t-1 is one period before time t. > > I have go through help menu in Mathematica. Yet, I could not get reached > to the topic of difference equation. If you know the code (or what to be > typed), could you reply this message? > > Thank you very much in advance. >
- References:
- Simultaneous difference equation
- From: Shusaku Yamamoto <shusaku.yamamoto@buseco.monash.edu.au>
- Simultaneous difference equation