[sage-support] symbolic expression not recognized in jupyter + sagemath 8.3

2019-05-01 Thread Augustin Lefèvre
Hello, I have been usage Sage for a few months. Up to now, plotting, polynomials, and arithmetic functions have been running fine. Now I'm trying to use the symbolic calculation skills of Sage, but ... I am getting the error : "unable to simplify to float approximation" when running, for

[sage-support] Symbolic expression of eigenvalues and eigenvectors of a real symmetric matrix 3x3

2014-02-16 Thread Junwei Huang
Hi all I am a physicist and a new user of Sage. I used the following command on Sage Version 5.1, Release Date: 2012-07-09, to get the expression of eigenvalue and eigenvectors of the symmetric real 3x3 matrix. var('g11,g12,g13,g22,g23,g33',domain='real')

[sage-support] Symbolic expression and complex number

2010-07-16 Thread sweedler
Hello I make computation with complex numbers and symbolic expression. My problem is on the multiplication between complex number, symbolic expression and a negative number. I give an example : sage: P=(1+i)*x sage: Q=-P sage: Q -(I - 1)*x sage: P+Q 0 On the line 4 it should be -(i+1)*x instead

Re: [sage-support] Symbolic expression and complex number

2010-07-16 Thread Minh Nguyen
Hi Cyrille, On Fri, Jul 16, 2010 at 5:42 PM, sweedler ospe...@gmail.com wrote:  I don't understand where is my mistake. You didn't make any mistakes. It's a bug in the version of Sage you were using. The bug has been fixed in the latest version of Sage: sage: version() 'Sage Version 4.4.4,

[sage-support] Symbolic Expression

2009-09-15 Thread Stefan Boettner
Hello, I'm trying to parse symbolic expressions, but got stuck very quickly. If I say: (x^2).operator() I get: built-in function pow If I say: pow I also get: built-in function pow But if I say: (x^2).operator()==pow I get: False How do I properly test if the topmost operation of an