20221017 17:21:19 +0100  answered a question  How to add latex itemize environment in sagemath markdown cell. With a single dash as first character in the line. More info: https://www.markdownguide.org/basicsyntax/#unorderedlist 
20221010 10:44:37 +0100  marked best answer  Integrating an integral Hi community. I'm interested in manipulating a formal expression $$\int \mathrm{d}t \; e^{ 2 \int \mathrm{d}t \; h(t)}.$$ My notebook contains the following code but the result is QUESTION(S):

20221010 10:34:52 +0100  answered a question  Integrating an integral Thanks to the comment by @fredericc I found the answer! The solution is to use the algorithm='maxima' flag, e.g. var('t 
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20221009 10:34:55 +0100  asked a question  Integrating an integral Integrating an integral Hi community. I'm interested in manipulating a formal expression $$\int \mathrm{d}t \; e^{ 
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20190730 10:47:49 +0100  marked best answer  Differential forms and tensors Dear all, A long time ago I was trying to implement a SAGE code for working with Differential Forms with values in a certain Lie algebra, but due to my lack of programming knowledge, I couldn't. This kind of objects are important for working with nonAbelin gauge theories. Question Is it possible to define and work with those objects? So far there is no reference of it in the manual. Thank you! 
20190520 14:11:07 +0100  marked best answer  Size of Labels on a Plot dear all: I'd like to know if there is any way to change the size of the font of labels (in a plot) without changing the size of the numbers on the ticks. Thank you 
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20190517 21:46:48 +0100  commented answer  Restricting a variable to a (real) range Thank you @dsejas Yes, your comment was incredible useful! It drove me to a nice solution. Since I had a lot of assumptions, I was trying to find a way to drop the last assumption (still don't know it possible), and looking for that I found the 
20190517 16:18:03 +0100  asked a question  Restricting a variable to a (real) range Hi. I'm solving a differential equation which depends on two parameters $c1$ and $c2$. They are both positive but in order to solve the equation, assume(c2  3 > 0) the equation is solved; But imposing Question Is it possible to set a condition like 
20190514 09:41:24 +0100  asked a question  Solving an ODE and simplifying the result I'm interested in solving the differential equation $$3 h' + 3 h^2 = c_1,$$ where $c_1$ is a positive real number. The above code works, but it's not solved explicitly for $h$, so This gives something like $$h\left(t\right) = \frac{\sqrt{3} \sqrt{c_{1}} {\left(e^{\left(\frac{2}{3} \, \sqrt{3} C \sqrt{c_{1}} + \frac{2}{3} \, \sqrt{3} \sqrt{c_{1}} t\right)} + 1\right)}}{3 \, {\left(e^{\left(\frac{2}{3} \, \sqrt{3} C \sqrt{c_{1}} + \frac{2}{3} \, \sqrt{3} \sqrt{c_{1}} t\right)}  1\right)}},$$ in sage notation (nonLaTeX) it starts like Question 1: Is there a way to allocate to the solution (i.e. I had to set by hand (it is ease, but it would be nice to automatize the allocation) Then, by simply looking at the solution it is clear that it can be simplified. I tried things like but none of them returns the expected result, which could be obtained from Mathematica's kernel $$ \sqrt{\frac{c_1}{3}} \tanh\left( \sqrt{\frac{c_1}{3}} (t  3 c_2) \right) $$ Question 2: How could the expression 
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20181204 09:18:37 +0100  asked a question  Sagemanifold  Connection components from a tensor (not a metric) Dear community. This might sound dump, but I'm trying to determine whether a tensor satisfy the properties of a metric (under certain conditions). Of course it is a (0,2)symmetric tensor, call it $S$, but I cannot (to my understanding) calculate the (LeviCivitalike) connection components that would be associated to $S$... unless I declare it as a metric. The way it is implemented makes sense... and it's solid! What I did...?I defined like a metric and calculate the associated connection (and curvatures) Why should I do something else?In the file Question:Is this possible? 
20181204 08:34:54 +0100  commented answer  How to get the collection of all functions from X to Y in SageMath Thanks for the theory! 
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20181203 19:20:48 +0100  commented answer  Subtitute functions  in a differential equation  Sagemanifold hehehehe... Thank you again! I almost got it... but I tried 
20181203 19:18:05 +0100  commented answer  Sagemanifold  `only_nonredundant = True` by default Excellent! Thank you for the answer, and a wonderful use of the 
20181203 18:37:06 +0100  asked a question  Sagemanifold  `only_nonredundant = True` by default Hi, I find the option 
20181203 18:33:37 +0100  asked a question  Subtitute functions  in a differential equation  Sagemanifold Dear community, I have a differential equation that depends on a function $\xi(t)$, but is a component of a tensor (calculated with I'd like to define the restriction to $\xi = 0$, and assign it to a new tensor but I get an I know that it works for functions QuestionIs there a way to substitute functions that are not 
20181128 22:16:13 +0100  commented question  Sagemanifold: autoparallel curve equations Currently I am not at work, I'll upload it tomorrow. Thanks for the interest. 
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20181128 19:13:43 +0100  asked a question  Sagemanifold: autoparallel curve equations Hello community. I'm interested in calculating the autoparallel curves defined by an affine connection (it has torsion). Following the recipes from the documentation notebooks in the sagemanifold web page I've achieved the goal with ease. However, in the result there is a function $h$, which is related with the torsion of the connection, shows up in the definition of the curve. I expected this function not to show... because one usually argue that the contribution of the antisymmetric part of the connection to the geodesic (or autoparallel in this case) vanishes, based in symmetry arguments (it is contracted with a symmetric tensor). Is the fact that I'm getting a contribution of the torsion in the equations a mistake in the algorithm of the curve equation or is a personal misunderstanding? 
20181126 13:26:42 +0100  marked best answer  Assignation of components of a differential form (or multivector field) in sagemanifold Dear all. I've crossed with the task of assigning components to a multivector field, and it's tedious! (specially higher ranks) Question: Is there an efficient way of assigning components to tensors with symmetries? 