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I need to export to a txt file the data from the following system of equations:x'[t] == px[t],y'[t] == py[t],px'[t] == x[t]/(2*Sqrt[x[t]^2 + (1 - y[t])^2]),py'[t] == -0.2 -...
Asked on 03/15/2021
1 answerI have three coupled second order ODE's given as below $x''[t] = -c_1*y'[t]-c_2*z[t]-c_3$ $y''[t] = -c_4*x'[t]$ $z''[t] = frac{c_5}{c_6}*x[t]-c_6$ where $c_i$'s are...
Asked on 03/15/2021 by Nawin
1 answerI have a series of ContourPlots that I want to compare in a GraphicsRow environment. I want to add a single legend for all three plots. Also, I really like...
Asked on 03/15/2021 by Neuneck
2 answerI have an expression that I would like to take limits of but not in a conventional sense. Take for example, an expression like ...
Asked on 03/14/2021
0 answerI have an SDE system which I solve usingproc = ItoProcess[{[DifferentialD]kai1[z] == 0.0001*I*kai1[z] [DifferentialD]w1[z] + I*kai1 [z] [DifferentialD]w2[z] - ...
Asked on 03/14/2021 by rami_salazar
2 answerThe overal question I am trying to answer is: For what $(x,y)$, which are positive integers, is the following number a perfect square number? $$9 left(x^3 (y-2)^2+3 x^2...
Asked on 03/14/2021
1 answerIm trying to evaluate some dot products with eigenvectors and matrices using Mathematica. My problem is the following: To an given matrix 6x6:h[kx_, ky_, t1_, B1_, B2_, ...
Asked on 03/14/2021
0 answerSuppose $F={0,1,w,w^2}$ is a field of $4$ elements, where $w$ is a root of $x^2+x+1$. (This means: $w^2=w+1,w=w^2+1, 1=w+w^2,w^3=1,2w=2w^2=1+1=0$). In order to find out the...
Asked on 03/14/2021 by dmtri
1 answerProblem How to simplify the following rules?The rules simplify (single, double, triple ...) summations of Kronecker delta.Replacement should occur if any summation and the Kronecker delta share an index.The rules...
Asked on 03/13/2021 by R zu
1 answerI'm new to functional programming of Mathematica and trying to remove one list of assorted elements from another. However I only find functions working with the Index rather than the...
Asked on 03/13/2021 by PeriodicProgrammer
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