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2017-08-17 00:18:50 +0200 | asked a question | Why does $\frac{2}{3} t - \frac{2}{3} y$ factors only when the variables are polynomial ring over the rational numbers? The expression $\frac{2}{3} t - \frac{2}{3} y$ can be factored as $\left(\frac{2}{3}\right) \cdot (y - t)$. If I try to use sage in this way to do the factorization: The result is still On the other hand, if do it like this: The result is as expected. Why does the call to |

2017-08-17 00:09:24 +0200 | commented answer | How to get sage to keep the same form as an expression from sympy? If I type |

2017-08-09 01:31:19 +0200 | asked a question | How to get sage to keep the same form as an expression from sympy? I have this expression: $$-\frac{2}{3} t_{1} + \frac{2}{3} y_{1}$$ and would like to rewrite it as follows: $$\frac{2}{3} (-t_1 + y_1)$$ Using sympy, I can get something close: This gives: But when I convert it back to Sage: The result reverts to How can I get the call to |

2017-08-06 02:14:37 +0200 | commented question | How to assume the sum of some variables is equal to a constant? Thanks for the suggestion. Do you have any idea why |

2017-08-06 02:13:58 +0200 | commented answer | How to assume the sum of some variables is equal to a constant? Any idea why |

2017-08-05 08:08:05 +0200 | asked a question | How to assume the sum of some variables is equal to a constant? Suppose I have this expression: $$\frac{a {\left(t_{1} + t_{2} + t_{3} - 1\right)}}{b} $$ This can be simplified to 0 if we assume $t_1 + t_2 + t_3 = 1$. How can I accomplish this in Sage? I've tried: I expected the second call to |

2017-08-04 01:09:07 +0200 | asked a question | How to reorder terms in an expression to follow a specific order? Suppose I have the following code:
Is there a way I can rewrite $$ {y_i} -{t_i}$$ ? I've tried using but that did not work. |

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2017-07-31 03:29:25 +0200 | asked a question | How to get Sage 8.0 to plot matplotlib plots inline and typeset expressions on a Jupyter notebook? If I start Sage 8.0 notebook using the jupyter notebook ( The plot displays inline but the expression $x+1$ is not typeset. If I run the following code: Then, the plot does not display inline. It shows: However, the expression $x+1$ is in typeset. How can I have both the matplotlib plots display inline and expressions typeset? |

2017-06-24 11:27:53 +0200 | asked a question | Can sage do symbolic optimization? I know sage has many functions to do numerical optimization. Now, I am wondering if sage can do symbolic optimization as well. For example, if I wanted to maximize a function using numerical methods, I could do this: Which gives the answer: Is there a function that can give the solution as $(\frac{1}{e}, \frac{1}{e})$ or do I have to compute the stationary points and perform the necessary substitutions myself? |

2017-06-08 03:08:39 +0200 | commented answer | Can I display a table of contents (TOC) in sage worksheet? Is there an equivalent add-on for Chrome? |

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2016-10-24 14:20:55 +0200 | marked best answer | Can sage find the equilibrium solution to a first order differential equation? I was reading this to get up to speed on how to use sage to solve differential equations. I notice it made no mention of finding equilibrium solution. Does this mean that sage has no function that can be used to find the equilibrium solution for a given ordinary differential equation? |

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