A powerful mathematical programming software with high level symbolic manipulation capacity.

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Anyone need expert help/consulting with advanced programming languages? [closed]

Code Genius was started at MIT to connect programmers in the scientific community to experts of advanced languages for efficient and cost effective support. Our platform helps programmers find the ...
1
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0answers
27 views

fixed point iteration to find out second order non-linear diff equations

I am working on some model analysis, getting two diff equations and after I convert them into matrix form, I have equations looks like $$ [A][X]=C\times\big(\exp([B][X])-1\big), $$ where $C$ is a ...
1
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0answers
28 views

How can i get this number set to be recooperated from a product sum? [closed]

W==a(x)=2*(W* x)/41; I'm attempting to make a new type of compression algorithm. A rubber band ball type. I'm trying to make a software that extracts, from that formula, the secret volumes of number ...
-1
votes
1answer
74 views

How to solve this differential equation using RK4 in C++?

How to apply these equation using second order DE using RK4 in c++ and how top plot a graph with it?? ...
2
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1answer
72 views

Mathematica NIntegrate function in C++

I am working on computing a challenging integral. I am working with someone else who wrote some code in Mathematica to compute it. I do not have mathematica so I am trying to do the same thing in C++. ...
1
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1answer
93 views

Approximate $h$ in $F(\theta)=\sin \theta \int_{-L}^{+L}h(z)e^{-ikz\cos \theta} \,dz$

Consider $$F(\theta)=\sin \theta \int_{-L}^{+L}h(z)e^{-ikz\cos \theta} \,dz$$ $$|z|\le L$$ $$0 \le \theta \le \pi$$ By having knowledge of $F(\theta)$, how can one approximate $h(z)$? In addition, I ...
0
votes
2answers
538 views

Most efficient library to diagonalize exactly large hermitian or unitary matrices

I am working on a physics problem which requires obtaining the exact eigenvalues and eigenvectors of Hermitian and Unitary matrices numerically. Naturally I would like to ask the experts what are the ...
2
votes
1answer
327 views

Comparing Eigenvectors, Mathematica vs. Matlab

I am trying to create the same outputs in Mathematica and Matlab, however I am running into trouble aligning the eigenvectors with the eigenvalues, I think the Matlab is doing something slightly more ...
1
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0answers
66 views

Stationary phase approximation for an integral with infinity saddle points?

I need a hand with the numerical evaluation, in Mathematica, for this integral: $$f(t)=\int_{-\infty}^\infty Exp\{it(\omega_H-\omega_l-\omega_k) - \sum _{j\neq(l,k)} S_j [1-e^{-it\omega_j}]\}\, dt$$ ...
3
votes
1answer
211 views

A programming model for Quantum Mechanics angular momenta in Mathematica

I'm writing prototypes for solving the Liouville Equations with Mathematica and C++. Perhaps the question about this may not be suited for this forum in a strict way, but it suits the people here ...
1
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0answers
45 views

Malliavin Derivative with Mathematica is it possible? [closed]

From mathematica.stackexchange: Is it possible to define a Malliavin calculus with Mathematica 9? Consider a random variables on the Wiener-space $\Omega=\mathcal{C}([0,1])$ of the form ...
5
votes
1answer
1k views

Laplace's equation problem in Polar Coordinates (Edit)

Is there public code in Matlab for solving the Laplace equation in polar coordinates in a circular domain? I tried a lot but my level of Matlab and Mathematica is not good enough, but still not ...
6
votes
2answers
356 views

Numerical Green functions for a nonlinear wave equation

I am trying to put down some code to get numerically the solution of the following PDE: $$ \partial^2_t\phi-\partial^2_x\phi+\lambda\phi^3=\delta(x)\delta(t). $$ Of course, there are several ...
2
votes
2answers
264 views

Numerical solution of fractional integro-diffrential equ. using collocation method?

problem comes from "Numerical solution of fractional integro-differential , equations by collocation method , E.A. Rawashdeh, Department of Mathematics, Yarmouk University, Irbid 21110, Jordan" ...
5
votes
3answers
5k views

Solving two coupled non-linear second order differential equations numerically

I have encountered the following system of differential equations in lagrangian mechanics. Can you suggest a numerical method, with relevant links and references on how can I solve it, and the ...
4
votes
2answers
1k views

Implementing a finite difference method in Mathematica

I am trying to iterate the following equation $$ x_{k}(n+1)=x_k (n)-\epsilon (x_{k+1}(n)-2x_k(n) +x_{k-1}(n))+\sqrt{\epsilon}\; \eta_{k}(n) $$ where $n$ denotes which time step I'm on and $k$ is the ...
4
votes
1answer
67 views

Migdal Recursion and Mathematica

I am studying $SU(2)$ lattice field theory, and I am attempting to use migdal recursion for renormalization. The main equation for Migdal recursion for my case is $$e^{-S_p(U,\lambda a)}=\left[ ...
2
votes
2answers
40 views

The region of allowed values ​​for solving the equation in Mathematica

In[2]:= Solve[sqrt(2x-9) == sqrt(4x+3), x] Out[2]= {{x -> -6}} But mathematically there is no solution, since sqrt (-21) is not defined. There is a flag that ...
11
votes
1answer
668 views

Replacing Mathematica's QuasiMonteCarlo integration in C++

I have a Mathematica program which performs some integrals in 3 or 4 dimensions using the QuasiMonteCarlo method. The problem is, it takes an annoyingly long time ...