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A typical problem in the calculus of variations is to extremize a functional $$ J[y]=int f(x,y,y') , mathrm{d} x.$$ This usually involves solving the Euler-Lagrange equation $$frac{mathrm{d}}{mathrm{d}x} frac{partial...
Asked on 12/07/2020 by imas145
1 answerI am trying to Plot Eigenvalues of a Hamiltonian, but I am getting noisy plot, which is incorrect. Here is the code. A1 = {{0, 1, 0, 0},...
Asked on 12/07/2020 by Hazoor Imran
2 answerI have $d/2$-dimensional variables $a,b$ jointly distributed as Gaussian($mu,Sigma$) in $d$ dimensions, and need to solve the following equation for $X$ $$E[ab^TXab^T]=Y$$ This is...
Asked on 12/07/2020
0 answerI have a list of codes that start with importing column D of an excel sheet which has a hyperlink. Then, the code moves onto importing the text version of...
Asked on 12/07/2020
0 answerI want to understand the mathematca formula A282720 The description saysNumber of nonzero terms in first n rows of the base-2 generalized Pascal triangle P_2(But the...
Asked on 12/06/2020
1 answerI'm getting trouble solving these 4 coupled differential equations, just can't get a result while it keep running.eqs =...
Asked on 12/06/2020 by KarryMa
1 answerMy goal is to efficiently find the $k$ shortest paths between a source and a destination in an undirected graph. I implemented two solutions of this problem myself, but,...
Asked on 12/06/2020 by delivery101
1 answerI have a set of code for which it involves finding the corresponding c for each a (although I will give a value of a later) and z using the...
Asked on 12/06/2020 by mathemania
1 answerCan Mathematica do the followings? (Note that dimension of matrices are given by general parameters like $m,n$)Can it do matrix calculation in general form? For example solving the following...
Asked on 12/06/2020 by mahyar s
0 answerI want to solve a system of partial differential equation in Mathematica.equation is: $ y_0 = 0.5, t_0 = 30, λ_{12} = 0.3, λ_{13} = λ_{23} = 0.01,...
Asked on 12/06/2020
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