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Let's take a simple differential equation: $frac{dx}{dt} = -x(t)$ Suppose we want to do a q-transform. To do this, we will replace the time derivative $frac{d}{dt}$ with the...
Asked on 01/20/2021
0 answerHow can I plot various points on a world map and compare distances?For example, the distance between Jerusalem and Westford, MA compared to the distance between Westford, MA and...
Asked on 01/20/2021 by DeathPunch
1 answerI' m writing a function with the following line:f[α_,x_, y_] := f[α,x,y] = Assuming[α > 0,Normalize[ E^(-α √(x^2 + y^2)),Integrate[#,{x,-∞,∞},{y,-∞,∞}]&]];The output I have isConditionalExpression[(E^(-Sqrt[x^2 + y^2] α) α^2)/(...
Asked on 01/20/2021
1 answerI try to solve the following system of coupled equations with NDSolve but the results seem to be not correct. I attached my code in which five dependent variables ...
Asked on 01/20/2021 by user35323
0 answerSuppose that there are two lists, where capital letters in List1 denote matrices.List1={A1,A2,A3,A4,A5} ={{{1,2},{3,4}},{{0,1},{3,1}},{{1,1},{2,3}},{{2,1},{5,0}},{{1,1},{2,2}}};(*ex: List1[[1]]={{1,2},{3,4}} *)List2={1,2,3,4,5};Suppose that we have the following code with Manipulate:...
Asked on 01/19/2021
2 answerThis Code:Manipulate[p1 = Plot[a*Sqrt[x] - b*Cos[x], {x, 0, time1}, PlotStyle -> Blue];p2 = Plot[a1*Sqrt[x] - b1*Cos[x], {x, time1 - lag, time2}, PlotStyle -> Red];p3 = Plot[a2*Sqrt[x] - b2*Cos[x], {x,...
Asked on 01/19/2021
1 answerI am trying to find the solution of the problem with boundary conditions $$frac{d}{dR}left(r *frac{dR}{dr}right)+(beta^2*r-(v^2/r))$$ in $0le rle b$ with the condition $kfrac{dR}{dr}+hR=0$. I am...
Asked on 01/19/2021 by Tania Mata Aguayo
1 answerI would like to plot a Graphics3D object colored based on the value of some spatial function. For example to plot a triangle colored by the function cf I might...
Asked on 01/19/2021
1 answerI have the following list :list={a^2, b^2, a^-1, a^2+b^2, (a+b+c)^-1, (a+b-c)^-2}Do[Print[list[[i]]//FullForm],{i,1,Length[list]}]I want to break this list into two lists: one containing elements starting with Power and another starting with...
Asked on 01/19/2021 by Boogeyman
4 answerIn the following code:p1=ParametricPlot3D[{ (3 + Cos[v]) Sin[u], (3 + Cos[v]) Cos[u], Sin[v]}, {u, 0, 2 Pi}, {v, 0, 2 Pi}] p2=ParametricPlot3D[{Cos[Sqrt[2] t](3 + Cos[t]), Sin[Sqrt[2] t]...
Asked on 01/19/2021 by user21210
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