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20201029 12:44:44 0500  commented answer  Generators of simplicial homology This problem is being tracked at https://trac.sagemath.org/ticket/30838. 
20201029 12:36:40 0500  commented answer  Generators of simplicial homology I don't think it's perfect — it should be fixed — but I'm glad it's helpful. 
20201029 12:05:03 0500  answered a question  Generators of simplicial homology This looks like a missing feature and/or a bug. Note that the documentation for
The bug is that there is no result at all, but you can recover it by doing: To interpret this, you need to know how the simplicial complex is turned into a chain complex. The simplices in each dimension are sorted in order to construct the matrices representing the boundary maps, so to get the first generator in dimension 1, for example, you would look at The first generator is given by 
20201028 14:03:25 0500  answered a question  Unbrackable blanck Here is a screenshot of what your code produces for me (using Sage 9.2): If I change 
20201028 13:56:39 0500  commented question  Unbrackable blanck What happens if you use 
20201026 16:47:33 0500  commented question  Unbrackable blanck Can you clarify? It is not clear what you are asking. In Python, 
20201026 11:39:07 0500  commented question  Cohomology ring of a Lie algebra

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20201019 23:21:20 0500  answered a question  what does the .<...> notation mean? As you probably know, Sage is built on top of Python, but then it extends Python's syntax. If you're not sure what some nonPython thing does, use the So 
20201016 11:39:33 0500  edited question  'builtin_function_or_method' object has no attribute 'split' Code: each line in the txt file is of the form 
20201015 17:16:42 0500  commented answer  Can attributes of sage classes be changed? I added an alternative in the edit. 
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20201014 18:17:19 0500  answered a question  Can attributes of sage classes be changed? I haven't tried this in sagetex, but it works in a Sage session: That's not what you want, so use latex.vector_delimiters to change the parentheses to what you want: Edit: An alternative is to modify your sagetex.sty file: change the line to Or maybe better, create an .sty file with this change, with a new name and use that instead of sagetex.sty. Then the first thing in your LaTeX file (after "\begin{document}") should be Then you can customize the output for each class, however you want. 
20201013 22:15:03 0500  commented question  Can attributes of sage classes be changed? The problem is that 
20201009 11:36:25 0500  commented question  Refinement between Lists of lists Surely you care whether each list in L2 is a sublist of a list in L1? Then you also want to know that if you concatenate and sort the two lists, the results are equal. Is that good enough? If not, perhaps the code at the link I provided can be modified to do what you need. 
20201008 23:53:03 0500  commented question  Refinement between Lists of lists Do the answers at https://stackoverflow.com/questions/3... help? 
20201008 23:49:48 0500  commented question  Refinement between Lists of lists Does the order matter? Is [[0,1]] a refinement of [[1, 0, 2]]? 
20201007 12:43:07 0500  commented answer  Obtaining a simplicial complex associated to a poset with the help of Sage You can also check 
20201007 12:12:55 0500  commented answer  Obtaining a simplicial complex associated to a poset with the help of Sage You can check things like 
20201007 12:08:35 0500  commented answer  Obtaining a simplicial complex associated to a poset with the help of Sage Mathematically, how do you check if a simplicial complex is homeomorphic to a sphere? 
20200930 11:21:00 0500  commented answer  too many for loops But if there are only 22 variables (for example), using a 
20200929 10:41:35 0500  commented answer  too many for loops You could use 15 
20200929 10:39:54 0500  commented question  too many for loops You could construct a polyhedron based on the ranges in your 
20200921 10:43:35 0500  answered a question  How to install an spkg (the one for GRDB Fano polytopes)? This is an "oldstyle" Sage SPKG, and those are no longer supported. The way to try to install, which would be unsuccessful, is to download the file from http://coates.ma.ic.ac.uk/grdb_polyto..., then run I don't see any easy way to work around this. You can still look at the data: this 
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20200914 23:23:30 0500  answered a question  Coefficient of Polynomial Function in a loop The indentation in your second code block is wrong, but if you fix that (don't indent No need for the variable In fact, no need for an explicit loop at all, using list comprehension instead: By the way, there are other ways to get at the coefficients. For example: will print You can get the same information using list comprehension, 
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20200912 11:18:40 0500  answered a question  Convert sage code from v8.1 to work in v9.1 There is a script 
20200908 12:14:59 0500  commented answer  Having trouble in solving two differential equations using desolve_system Maybe 
20200904 10:28:22 0500  commented question  Typo in Sagemanifolds worksheet ? If it's a mistake, it's worth a ticket. 
20200815 11:02:24 0500  commented question  Error when trying to integrate I think the problem is parentheses, not Sage. 
20200814 19:40:30 0500  commented question  Error when trying to integrate Don't use "N": just use 
20200814 19:15:00 0500  edited question  Error when trying to integrate This is what I want to do in Sage. It can be done very easily in Desmos. https://www.desmos.com/calculator/7oc... I am just trying to do this integral in Sage. When I do it the answer I get is f(x) = (1/3.33sqrt(2pi))exp((1/2)((x9.486)/3.33)^2) N(definite_integral(f(x), x, 6, 23)) 5.35572539176154 
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20200804 20:10:27 0500  answered a question  Sage fails to recognize `1 + (1/2 + i*sqrt(3)/2)^3` is zero I did: Then returns returns 
20200730 16:58:30 0500  answered a question  Creating a matrix from block I'm not sure what you've tried, but you need to convert the vectors to matrices: Now you can modify the subdivisions, if you don't like the current ones. For example: 
20200715 18:04:39 0500  answered a question  Checking what the span is for a vector Looks like you are trying to solve the matrix equation Of course this need not have any solutions, and if it does have a solution, it may not be unique. 