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So I am trying to use DSolve to solve the following system of equations:eqns = {c1'[ t] == -I/ h (H12 c2[t] E^(-I W12 t ) + ...
Asked on 07/13/2021 by Nikolaos Petropoulos
1 answerGiven a function f[{x,y}] it is rather simple to use, for example, NSolve to find periodic points of period $n$. We simply take something like NSolve[f[f[f[{x, y}]]] == {x,...
Asked on 07/12/2021
0 answerI've been trying to solve this initial value problem using DSolve[]: $$frac{dy}{dt}=1+tspace sin(tspace y),quad y(0)=0, quad t=[0,2]$$ClearAll[y, t]eq1 := {y'[t] == 1 + t *Sin[t y[t]],...
Asked on 07/12/2021 by Walser
1 answerThis the code of Hofstadter spectrum for square lattice using Mathematica matrix[p_, q_] := Module[{sigma}, sigma = p/q; N@SparseArray[{{m_, m_} -> ...
Asked on 07/12/2021 by Yduog chan
1 answerAre there any symmetry finding packages (for differential equations) that work with Mathematica 11.1? I've tried MathLie but from looking at the documentation it had instructions for Windows 95... I...
Asked on 07/12/2021 by Pythonista
2 answerI would like to know: how can I construct minimalist images like this one? ...
Asked on 07/11/2021
2 answerA question related to a previous question. The answer in the previous question works well for simple complex arrays but not when considering arrays with exponential float coefficients as...
Asked on 07/11/2021
1 answerThis simple integration:Integrate[ E^(I q x)/(q + I [Kappa]), {q, -[Infinity], [Infinity]}, Assumptions -> { x [Element] Reals, [Kappa] [Element] Reals, x != 0, [Kappa] != 0 }]gives a...
Asked on 07/11/2021
1 answerdelFunc[funcform_, lstofparams_,lstoferrs_] := √Total[Table[(D[funcform, lstofparams[[i]]]*lstoferrs[[i]])^2, {i,Length[lstofparams]}]]funcanderr[funcform_, lstofparams_,lstofvals_] := {funcform,delFunc[funcform, lstofparams, #[[2]] & /@ lstofvals]} /.Table[lstofparams[[i]] -> lstofvals[[i, 1]],{i,Length[lstofparams]}]I want to evaluate the numerical value of "funcanderr" with some...
Asked on 07/11/2021
1 answerIs there a package in Mathematica that will allow me to simulate collisions of 3d rigid bodies? If not, what known libraries could I use and how? For example, one...
Asked on 07/11/2021
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