Precision help needed *ASAP* - Thanks
- To: mathgroup@smc.vnet.net
- Subject: [mg12047] Precision help needed *ASAP* - Thanks
- From: "J.B." <yu141867@YorkU.CA>
- Date: Fri, 24 Apr 1998 01:52:18 -0400
- Organization: .as
Hello, Any help, or insight would be appreciated. I can be reached at yu141867@yorku.ca. Please be considerate since I am no expert, I'm just a guy who is trying to solve for a problem My problem is relatively simple and common but the solution escapes me if there is one at all. Within a limited precision say 20 digits, I have to invert my results several times, and sometimes back again BUT; 1 / x = 0.5624136....3233 and 1 / 0.5624136....3233 = x is not happening. I know this is the result of rounding error, but as an accumulative process it really makes my life harder, since I have no way of knowing how the result was numbered. So my question is: How do I compensate in result of 1/x so that when I try to go back I do get my x, without keeping a list of things to do at each step. Again - a million thanks for any insight/help. I am using Mathematica 2.2 on a very old Mac.