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2019-11-08 17:49:54 +0100 | commented answer | Trigonometric simplifications and matrices Wow, what is even more weird is that it seems that if you go with an even number of matrices, sage can simplify with one trig-reduce, but needs two for an odd number of matrices |
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2019-11-08 15:53:07 +0100 | asked a question | Trigonometric simplifications and matrices I want to simplify trigonometric identities in a matrix. For example, say I want to show that the composition of two rotation matrices is a rotation, I can do with sage something like
Note that However when I get to 3 matrices, sage can't simplify with the above procedure:
For example, the 1-1 entry in this matrix is returned as What's happening here? Any other way to force the simplification? |
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2019-09-10 19:55:05 +0100 | commented answer | Substitution of free variable This should work. I think I should be able to adapt it if there are more than 1 free variable as well |
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2019-09-10 19:34:53 +0100 | asked a question | Substitution of free variable I have sagecells on a page that are used to solve some equations.
In a further cell, I want to substitute a given value in place of a
free variable. Sage's free variables have names such as Is there a way (some kind of wildcard) to substitute a value for a free variable without knowing its name? I'd like this because depending on the order of execution a user would press the cells, the names would change. It would look like this CELL1 CELL2 and then further down I would like a new cell that would substitute
the free variable in However if I use something along the line of and the user executed for some reason cell2 before cell1, it will not work. |
2014-02-11 00:24:16 +0100 | asked a question | solve() and square roots Why can't Sage solve equations of the type x-sqrt(x)=0. Here is what I get It does not have any problems solving sqrt(x)=5, giving |
2014-02-06 17:50:26 +0100 | commented answer | Plotting in Ubuntu 12.10 This worked for me |
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