Computational Science Questions, Problems & Solutions : TransWikia.com ~ Page 24

Implicit methods for variable coefficients based on equations of state

For example I have an equation that goes something like $partial_t rho = -nablacdot (rho u) + nabla cdot(D(rho, T) nabla rho) + rho_s$ ($rho, rho_s,...

Asked on 04/12/2021

1 answer

Compute point-spread-function between original and blurred image

Take an image $f$ with some characters on it (below, hjFu3).Let's apply a filter $h$ on it to obtain a second image $g$ where the text...

Asked on 04/12/2021

2 answer

Generating structured paraboloid using gmsh

I am trying to get the structured mesh as shown in the figure. I have used the transfinite surface and curve to achieve the same. Though I get the structured...

Asked on 04/09/2021 by jomegaA

1 answer

Why is Time evolving block decimation so efficient?

I have a short question about Time evolving block decimation (TEBD). During a lecture I was told that this method is very efficient in evolving 1D quantum...

Asked on 04/09/2021

1 answer

How can I change th code to implement the Fourier series as defined?

I want to compute the Fourier series expansion of the function $$f:[-1,1] to mathbb{R}$$with $$f(x) = begin{cases} -x & x <...

Asked on 04/09/2021

0 answer

Problem of half-planes intersection

Consider the half-planes ${x leqslant 2}$ and ${x+y leqslant 3}$. These two half-planes are coded with the R package 'rcdd' as follows:library(rcdd)A <- rbind( c(1,...

Asked on 04/06/2021 by Stéphane Laurent

2 answer

Good method for correlated samples and estimating autocorrelation times

I'm working on a Monte Carlo project similar to the Ising model. I've found many examples on which I've based my code. From some papers I read...

Asked on 04/04/2021 by Daniel Sela

1 answer

Coding up Newton's method for a mapping from R^2 to R -- the Jacobian wouldn't be invertible

I'm trying to code up in Matlab a multivariable Newton's method, for a mapping from R^2 to R, but the Jacobian would be a 2x1 matrix, not square, so it...

Asked on 04/03/2021 by user37077

1 answer

How to make a directed graph symmetric?

Say I have a directed graph given as an adjacency matrix $A$ in CSR format represented by the arrays ia (row indexes) and ja (column indexes)....

Asked on 04/02/2021 by IPribec

0 answer

Writing a programming code directly from the mathematical formula?

For using any programming language, a mathematical formula should be written in the corresponding code. I wonder if there is any service (for any programming language, Matlab, Mathematica, Python, etc)...

Asked on 04/01/2021 by user25735

2 answer

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