20210324 12:35:38 +0200  commented question  How to load .sobj files into Jupyter Notebook Does this work in terminal? (i.e. at sage: prompt) 
20210217 13:36:15 +0200  commented answer  Sagemath 9.2 Product function Bug this is an oldish bug, same happens with almost 3 years old https://github.com/pynac/pynac/releas... 
20200609 13:38:43 +0200  commented question  Toric Ideal of Point Configuration Yielding Whole Ring? I've opened https://trac.sagemath.org/ticket/29832 
20200609 12:54:24 +0200  commented question  Toric Ideal of Point Configuration Yielding Whole Ring? with the notation of the answer by @rburing, you probably need the difference with the Macaulay2 answer is probably due to a different monomial order used. (In Sage computation it's the default order used). Unfortunately our Macaulay2 insterface is brokek atm: https://doc.sagemath.org/html/en/refe... 
20200609 12:33:47 +0200  commented answer  Toric Ideal of Point Configuration Yielding Whole Ring? That 'neglex' order (a local order, not a proper Groebner basis order) looks out of place there. Without it, the saturations of the naive ideal with x_i are already done, so the answer shoud be the same as the naive ideal. 
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20200114 17:52:50 +0200  commented answer  Orbits on group actions acting on sets I've edited the answer to indicate this. 
20200114 17:52:23 +0200  edited answer  Orbits on group actions acting on sets In a way, everything which is possible in GAP is also possible in Sage, as Sage starts up a GAP subprocess and communicates with it. So you need not have Sage bindings for every GAP function. E.g. you can do Nowadays (Sage version 8.6 or newer) one can do 
20200114 12:02:49 +0200  answered a question  error with mpmath.findroot on 8.9 Reported on https://github.com/fredrikjohansson/... indeed it seems to be a Python3 issue. 
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20191013 13:11:40 +0200  answered a question  Building Sage 8.9 from source fails To use system's readline on on Ubuntu 16.04, one needs to install libncurses5dev and libreadlinedev (16.04 has a bug: the former is not a dependency of the latter, even though by right it should be) As far as building Sage's readline goes, unfortunately we have not figured out yet what exactly goes wrong with building Sage's readline on 16.04. As a workaround, in the file build/pkgs/readline/patches/0002ltinfo.patch replace the line with This shoud give a working readline built by Sage (hopefully) 
20191011 19:16:43 +0200  commented answer  Building Sage 8.9 from source fails this is a symptome of underlinking in readline. In its infinite wisdom readline's devs refuse to fix this old bug; it needs to be linked with libtinfo or other suchlike library, and it keeps resufacings in various forms... 
20190913 11:14:58 +0200  answered a question  SageAppliance not more maintained after 8.1? OVA is more awkward than the Cygwin build, so that's why it stopped. You might want to try Sage 8.8 http://www.mirrorservice.org/sites/ww... Or if you comfortable with VirtualBox (or other VM) on Windows, you may just build Sage there from source. 
20190129 19:41:20 +0200  answered a question  possible to solve this optimizationproblem with LMI? Yes, semidefinite optimisation is available in Sage, check out 
20181218 06:09:09 +0200  commented answer  ImportError: No module named 'sage' put that one like into a file, and source it every time you want to start anaconda. (Better, make a script that sources this line and starts Anaconda for you). 
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20180322 17:19:56 +0200  commented question  save/load session in standalone python In ipython there are special tools for this (I guess they are used in e.g. Jupyter notebook environment to save the state), see e.g. https://stackoverflow.com/questions/2... 
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20180306 03:40:52 +0200  answered a question  Error with is_prime Thanks. This is the fix (the whole 
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20171005 12:17:08 +0200  commented question  Build Error when Uploading Notebooks in Sage thanks, see https://github.com/sagemath/sagenb/is... for this problem. 
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20170718 11:30:22 +0200  commented answer  Submatrix of a given matrix by deleting some rows and columns(For my case 2 rows and columns). Well, but this is a straightforward Python loop to write. In the loop, create two lists, say, ro, co, using range(), remove ith (resp. jth) elements from it, call A[ro,co].det()/A[ro,ro].det() to compute the corr. determinant ratio, store it in B. 
20170718 09:45:35 +0200  commented question  How to obtain the resistance distance matrix of a graph? I imagine that scipy does not convert the pseudoinverse exactly. Anyhow, please specify the example of a graph on which you see the problem. 
20170718 09:18:34 +0200  commented answer  Restricted usability of Singular after upgrade there is a little 'V' field under the answer score counter on the right, which one ticks to accept the answer. I just did it here. 
20170718 09:15:30 +0200  answered a question  Submatrix of a given matrix by deleting some rows and columns(For my case 2 rows and columns). You can create lists of rows and columns and use them to cut out a submatrix. E.g. 
20170211 19:27:00 +0200  commented answer  highest dimension polyhedron no, not really. See https://arxiv.org/pdf/math/9909177.pdf for bounds and examples. E.g. in dimension 13 you might have more than 17000000 facets. 
20170209 21:27:16 +0200  answered a question  highest dimension polyhedron this depends on the input quite a bit. Namely, the following factors play a big role:

20170209 21:05:41 +0200  commented answer  Restricted usability of Singular after upgrade Why would you think this is Singular problem? Univariate polynomials are not handled by Singular in Sage, they are handled by either Flint, or NTL, or Givaro (the latter for finite fields only). We need more info to track your issue down. E.g. could you at least tell us the output of 
20160728 10:08:22 +0200  commented question  second degree irreducible polynomial over extension field I presume the question is about how to build a quadratic extension of GF(8) explicitly. 
20160728 09:08:54 +0200  answered a question  Faster function for working with cosets Here is an example of how to get a list of coset representatives: Please feel free to ask for more details. 
20160726 17:43:19 +0200  commented answer  Semimonomial transformation group I am not 100% sure that you want to start with the permutation group  it might be a proper quotient of the "real" group, and then you need to do something else. 
20160726 17:42:10 +0200  answered a question  Semimonomial transformation group will give you the underlying permutation group. It has 1 orbit in its natural action (on 8 points): You can convert it into a matrix group acting on GF(4)^8. Now you can compute orbits on vectors (see e.g. code in 
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20160404 20:23:39 +0200  commented question  osx installation sounds like you've changed the default OS configuration, as on OSX the system python is still python2, and this means that you won't see any missing brackets in print, normally speaking. What is that extra hack that you have on? Homebrew? Anaconda? Something else? 
20151103 15:56:21 +0200  commented answer  After upgrade to 6.9 we obtain SIGILL ... I take this as you have an upgraded Mac, right? And which version of OSX? (IMHO it's a nonstandard config anyway, and you'd be best off building from source.) 
20150512 18:10:03 +0200  answered a question  public.pem File Not Created in OSX Lion please see https://github.com/sagemath/sagenb/is... 
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20150413 12:48:54 +0200  answered a question  Matrix dot multiplication slowness and BLAS versions numpy in Sage uses Atlas for matrix operations; if you use a binary Sage installation then Atlas might be not optimised for your hardware. To get good Atlas performance, the best is to build Sage from source. 
20150210 10:23:06 +0200  answered a question  System of 3 equations in 3 variables with symbolic coefficients I very much doubt that there are closed form solutions for such a system. It looks like this would imply that univariate polynomial equations of arbitrary degrees have a closed form solution, which is wellknown not to be the case. 
20150206 18:31:52 +0200  answered a question  Build command for LaTeX project as a last resort, open the terminal, run latex or pdflatex there... 
20150205 10:25:27 +0200  commented question  Browser needed I guess no, that's good as it is. 
20150204 21:11:50 +0200  commented answer  Multiuser environment yes, ControlC is good. One can also run 'sage n'  this immediately opens the notebook.` 
20150204 14:23:22 +0200  commented answer  Multiuser environment in case you might like to know where the notebook files are: they are in ~/.sage/ for the account Sage (nb) is executed from.Thus each user in this configuration will have completely own set of notebooks. 
20150203 10:41:43 +0200  commented answer  Multiuser environment a regular Linux user's notebook() will be run in his/her Linux account. They will be admin for this notebook server, by default (unless they specify another user in notebook() call, or log in via the browser to another, suitably created, nb account). 
20150203 10:33:11 +0200  commented answer  Multiuser environment In the latter case you don't even need Sage nb users to have Linux accounts on the server, but watch out for security settings in this case... 
20150203 10:31:14 +0200  commented answer  Multiuser environment There are two things you can do  either let each user on the machine to run Sage separately, just by running /usr/tmp/sage/sage6.4.1/sage, or you run a "public" Sage nb server. In the latter setup accounts on the (Linux) server have nothing to do with accounts on the Sage nb server. 
20150201 19:59:55 +0200  commented question  Multiuser environment have you installed it systemwide, or in your own account? 