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| 2013-12-22 15:41:45 +0200 | commented answer | solving a matrix equation modulo m Ok thank you, with 6.0 everything works fine now! |
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| 2013-12-22 11:48:04 +0200 | commented answer | solving a matrix equation modulo m This is my version: 'Sage Version 5.8, Release Date: 2013-03-15' |
| 2013-12-22 09:17:33 +0200 | commented answer | solving a matrix equation modulo m Hello and thanks for the answer. If I try your example above I get the following error: TypeError: base ring must be an integral domain I get this error if and only if m is not prime (in this case m=15 is not prime). I tried your example with the free sage provided online at [sagemath](http://www.sagemath.org/) and there it works fine. So could it be, that my version is not up to date, although I downloaded it last week? |
| 2013-12-22 09:16:30 +0200 | answered a question | solving a matrix equation modulo m Hello and thanks for the answer. If I try your example above I get the following error: TypeError: base ring must be an integral domain I get this error if and only if m is not prime (in this case m=15 is not prime). I tried your example with the free sage provided online at sagemath and there it works fine. So could it be, that my version is not up to date, although I downloaded it last week? |
| 2013-12-22 07:12:57 +0200 | asked a question | solving a matrix equation modulo m Hello, I am quite new to sage an have troubles with the following problem: I'm given a matrix 'A' and a vector 'b' and a positiv interger 'm' (m does not have to be prime). 'A' is a matrix with more rows than collums, so it is not quadratic. I would like to find the solution 'x' of the equation: A*x = b (mod m). I have tried to manage it with e.g.: A.solve_right(Integers(m),p), but this works only if m is prime. I also was able to solve my problem if I explicitly insert the equations like this: gp('matsolvemod([1,2;1,3],6,[1,0]~,1)') But I need something, where I just have to specify 'A' and 'b' (and of course m). Can somebody help me? best regards |
Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.