SageMath
by stillconfused
13h ago
I am trying to install the Kohel database but running into an error I don't understand. From what I gathered online I should run `sage -i database_kohel` in my Linux terminal, but this is giving me the following error : `make: *** No rule to make target 'all-toolchain'. Stop.` I am running Sage 9.5 in WSL using an Ubuntu terminal. Any help would be appreciated ..read more
SageMath
by Emmanuel Charpentier
22h ago
Inspired by [this question](https://ask.sagemath.org/question/67158/how-to-get-selective-outputs-printed/), I stumbled in an unexpected difficulty when trying to compare two `Set`s : sage: L[:2] [[ [ 2 -2] [0 1] [ 0 1] [-2 1], [0 1], [ 0 -1/2] ], [ [ 2 -2] [ 0 1] [0 1] [-2 1], [ 0 -1/2], [0 1] ]] sage: Set(L[1:])==Set(L[1:]) False Quite unexpected... However : sage: all([u in Set(L[1:]) for u in Set(L[1:])]) True sage: all([u in Set(L[1:]) for u in Set(L[1:])]) True as expected. The `Sets` [reference](https://doc.sagemath.org/html/en/reference/sets/sage/sets/set.html) doesn't ..read more
SageMath
by mak3521
1d ago
After running my code > ------------------- ------------------- if................ show((x,y,z)) The output is a collection of list of triplets of square matrices of same order. I want only those output to be printed which contain same set of three matrices, keeping the first matrix fixed. That is, for example, suppose I am getting the following outputs: 1.[A1,P,Q] 2.[A1,Q,P] 3.[P,Q,A1] 4.[A2,L,M] 5.[A2,M,L] 6.[A2,X,Y] 7.[Q,L,A1] Now consider the first three outputs . The first two outputs are to be considered same. But the third output is to be considered different, though all three output ..read more
SageMath
by aliosman9522
3d ago
how can i get (n) linearly independent vector for a given space ? for example ; v=VectorSpace(GF(11),8) can i get 6 "RANDOM" linearly independent vector ..read more
SageMath
by hiros1
4d ago
Why the following code does not work with SageMath version9, though it works with SageMath version8? f(x,y)=sin(x+2*y) numerical_integral(f,0,pi,params=) SageMath version8.6 gives (-1.6781430581529053, 2.2206773047754592e-14). SageMath version9.7 gives (0.0, 0.0). Execution of numerical_integral(f(x,5), 0, pi) in SageMath version9.7 also gives (-1.6781430581529053, 2.2206773047754592e-14 ..read more
SageMath
by ginn
4d ago
I am wondering if there's sample code that allows javascript to interact with the sagecell where it can display an output from the sagecell after evaluation. I want javascript to be able to send code to the sagecell and ask the sagecell to evaluate the code. Then I want javascript to be able to alert the evaluated code ..read more
SageMath
by SW_k
4d ago
As the title suggests, whenever I try to render anything in 3D (a polygon, for example) in a Jupyter notebook in VSCode using the Sagemath kernal with WSL, the output is just a blank space that is approximately the size of what the output graph is suppose to look like. If I try to switch from the text/html to text/plain, the original render would change to one line of "Graphics3d Object." Is there a fix to this? Thanks ..read more
SageMath
4d ago
def undamped(x, t): return [x, x-x^3] from scipy.integrate import odeint from scipy import linspace coordinates=0 nbpts = 1000 # number of points endtime = 20 # end of time span tspan = linspace(0.0, endtime, nbpts) ics1 = [0.09, 0.0] # first initial conditions sol1 = odeint(undamped, ics1, tspan) solx1 = [(tspan[k], sol[m]) for k in range(nbpts)] xplot1 = list_plot(sol, axes_labels=['t','x'], size=1) coordinates1 = [(s, s) for s in sol1] phaseportrait1 = list_plot(coordinates,axes_labels=['x','y'], size=1) a = graphics_array([xplot1, phaseportrait1]) a.show ..read more
SageMath
by rebeccarohrlich
4d ago
As title. If p and k are integers, and k is positive, then p^k should be an integer. Why is Sage telling me otherwise, and how can I convince it of the truth? ---------- `sage: var('p,k')` `(p, k)` `sage: assume(p,'integer')` `sage: assume(k,'integer')` `sage: assume(k>0)` `sage: alpha = p^k` `sage: alpha.is_integer()` `False ..read more
SageMath
by scc12
4d ago
Given a certain matrix, how do you remove scientific notation on the entries? For example, for 10000000000.0 show the full number instead of 1e10 ..read more