2021-05-29 17:19:19 +0200 received badge ● Popular Question (source) 2021-05-05 03:58:40 +0200 received badge ● Popular Question (source) 2021-04-27 08:02:44 +0200 received badge ● Popular Question (source) 2021-04-27 08:02:44 +0200 received badge ● Notable Question (source) 2021-04-27 08:02:44 +0200 received badge ● Famous Question (source) 2021-01-22 23:53:28 +0200 received badge ● Popular Question (source) 2021-01-19 21:06:33 +0200 received badge ● Notable Question (source) 2021-01-19 21:06:33 +0200 received badge ● Popular Question (source) 2020-11-22 23:39:21 +0200 received badge ● Famous Question (source) 2020-11-19 16:39:47 +0200 received badge ● Popular Question (source) 2020-01-20 11:14:13 +0200 received badge ● Popular Question (source) 2020-01-17 12:14:07 +0200 received badge ● Popular Question (source) 2019-11-24 20:26:00 +0200 received badge ● Popular Question (source) 2018-08-10 01:42:18 +0200 received badge ● Taxonomist 2017-12-12 04:44:24 +0200 received badge ● Notable Question (source) 2017-12-12 04:44:24 +0200 received badge ● Popular Question (source) 2017-12-08 05:58:01 +0200 marked best answer numerical approximations of complex_embedding How can I get a numerical approximation of an expression like 3^(1/2)/2 which is not 0.866025403784439? 2017-11-12 20:50:21 +0200 received badge ● Popular Question (source) 2017-08-01 19:10:59 +0200 received badge ● Popular Question (source) 2017-06-15 07:27:22 +0200 received badge ● Famous Question (source) 2017-06-08 10:31:04 +0200 received badge ● Popular Question (source) 2017-04-08 17:03:49 +0200 received badge ● Popular Question (source) 2016-11-11 18:06:45 +0200 received badge ● Notable Question (source) 2016-06-23 22:57:32 +0200 received badge ● Notable Question (source) 2016-06-23 22:57:32 +0200 received badge ● Popular Question (source) 2016-06-09 11:20:51 +0200 received badge ● Popular Question (source) 2015-12-06 05:27:46 +0200 received badge ● Notable Question (source) 2015-11-24 16:44:54 +0200 received badge ● Notable Question (source) 2015-10-17 21:09:55 +0200 received badge ● Famous Question (source) 2015-07-27 15:56:43 +0200 received badge ● Popular Question (source) 2015-07-27 15:56:43 +0200 received badge ● Notable Question (source) 2015-04-26 20:45:18 +0200 received badge ● Notable Question (source) 2015-04-01 21:13:24 +0200 received badge ● Notable Question (source) 2015-04-01 21:13:24 +0200 received badge ● Famous Question (source) 2015-03-27 04:12:33 +0200 marked best answer cannot run: from sage.rings.number_field.splitting_field import SplittingData When I type this line from sage.rings.number_field.splitting_field import SplittingData  in Sage, I get the following error message: Traceback (click to the left of this block for traceback) ... ImportError: No module named splitting_field  I see in the online documentation that splitting fields of polynomials over number fields is very recent in Sage: 2014-01-02 Jeroen Demeyer  2015-03-27 04:12:33 +0200 marked best answer how to plot poset and subposet in a graph? hot to put poset and subposet and order_filter and order_ideal in one graph,but different color? PP = Posets(6)[18];show(PP,vertex_size=100,vertex_colors='yellow'); Q = PP.subposet([2,4]);Q;show(Q,vertex_size=100,vertex_colors='green') PP.order_filter([3,2]);PP.order_ideal([4,3]) 2015-03-27 04:12:32 +0200 marked best answer why sagenb.mc.edu cannot register? sage.lacim.uqam.ca cannot register too ,why? and sage.lacim.uqam.ca not in wiki.sagemath.org servers lists,why? 2015-03-27 04:12:28 +0200 marked best answer is notebook(interface='', secure=False) a loophole? I try command:notebook(),it is some information about SAGENB servers...... I have no more secrity knowledge about computer,It maybe change admin passwords? 2015-03-27 04:12:25 +0200 marked best answer question about hilbert_class_polynomial I run sagecell hilbert_class_polynomial sqrt(-5),but different with below: http://echidna.maths.usyd.edu.au/kohe... http://sagenb.skku.edu/home/pub/155/ 2015-03-27 04:10:25 +0200 marked best answer AttributeError: 'NumberFieldFractionalIdeal' object has no attribute 'ray_class_number' ray_class_number canot run..... I tried an example from doc/reference: K. = QuadraticField(-23); p = K.primes_above(3)[0]; p.ray_class_number() x = polygen(K) L. = K.extension(x^3 - z) I = L.ideal(5) I.ray_class_number()  2015-03-27 04:10:01 +0200 marked best answer when I unloading a *.sws,how cannot find it out ? I download SM_sphere_S2.sws,and uploading it (project/new/to Upload files from your computer),but where is it? no save button..... link text 2015-03-27 04:09:58 +0200 marked best answer what matrix.plot meanings? when I run bolow,a graph appears,how to understand it? matrix([[3,-1,1],[2,0,1],[1,-1,2]]).plot() 2015-03-27 04:09:58 +0200 marked best answer some links cannot back Sage Reference Manual when link below,no button to back to Sage Reference Manual REFERENCES: [WpJacobianVariety] http://en.wikipedia.org/wiki/Jacobian... 2 https://sage.epsevg.upc.edu:8000/doc/... when link below,no button to back to Sage Reference Manual,it link to http://trac.sagemath.org/13100,but blank page... there are more links like above troubles at other places in Sage Reference Manual,I meet several times 2015-03-27 04:09:57 +0200 marked best answer where is all others published in cloud sage? where is all others published in cloud sage? I try cloud.sage can plot and published myself, it very well but where others published? the cloud projects use like labyrinth, it is too complex....... 2015-03-27 04:09:57 +0200 marked best answer how to transfer *.svg to *.gif or jepg? how to transfer *.svg to *.gif or jepg? 2015-03-27 04:09:57 +0200 marked best answer how to define var vector? sage: a,b,c=var("a,b,c") sage: v = vector(QQ, ["a", "b", "c"]);v ... TypeError: unable to convert a to a rational  cannot run 2015-03-27 04:09:56 +0200 marked best answer how to use the function ord()? ord? there no example. and other function like lambda?, no in index of Sage Reference Manual 2015-03-27 04:09:56 +0200 marked best answer why lim((x^2-x+1)^(1/2)+x,x=-oo,dir='below') is red error x=-oo, negative infinity,the answei is appear,but red error,1/2 is right? lim((x^2-x+1)^(1/2)+x,x=-oo,dir='below') Error in lines 0-2 Traceback (most recent call last): File "/projects/9e8c4ed8-0b57-4535-b8f1-a0d0ef1b015b/.sagemathcloud/sage_server.py", line 841, in execute exec compile(block+'\n', '', 'single') in namespace, locals File "", line 1 ) ^ SyntaxError: invalid syntax  2015-03-27 04:09:56 +0200 marked best answer what meanings about global_height of AffineSpace'point P.=AffineSpace(QQ,2) Q=P(41,1/12) Q.global_height() 2015-03-27 04:09:19 +0200 marked best answer can sagecloud open many windows like sagenb? sagenb has many windiws when need,how to do in sagecloud?