# Tagged Questions

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### Finding matrix inverse by Gaussian Elimination With Partial Pivoting

Hello guys I am writing program to compute determinant(this part i already did) and Inverse matrix with GEPP. Here problem arises since i have completely no idea how to inverse Matrix using GEPP, i ...
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### Computing positive semidefinite (PSD) rank with mathematical software

I would like find positive semidefinite (PSD) rank or a decomposition for 10~15 size square nonnegative matrices with the aid of some mathematical software. I wonder if it is feasible with standard ...
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### Find the smallest square matrix in which some objects fit following some rules

I have to put some objects in a matrix. The data of these objects is given in another matrix in which each line contains an object, and the first column represents its width, and the second its ...
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### 'Linux' math program with interactive terminal?

Are there any open source math programs out there that have an interactive terminal and that work on linux? So for example you could enter two matrices and specify an operation such as multiply and ...
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### MATLAB Fermi-Pasta-Ulam lattice model can't force periodic boundary condition

I am building MATLAB code to implement a symplectic integrator using a second order split-step method for the Fermi-Pasta-Ulam problem. The Hamiltonian is in the form: H = sum from i=1 to N ...
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### What is this unary matrix operation called?

I have the folowing problem! $B \cdot \overline{X} = C$ where $B$ is $(12 \times 12)$ matrix and $C$ is $(12 \times 4)$. $X$ is unknown. What does $\overline X$ mean? Also I need to solve this in ...
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### How to minimize matrix function in MathCAD?

I'm new to mathcad and i'm experiencing problems with using it. I need to minimize my function Trr(Rr), where Rr is matrix with ...
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### FLOSS tool to visualize 2- and 3-space matrix transformations

I'm looking for a FLOSS application (Windows or Ubuntu but preferably both) that can help me visualize matrix transformations in 2- and 3-space. So I'd like to be able to enter a vector or matrix, ...
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### Does MATLAB take care of sparsity itself?

Suppose i have matrix of size 1000*1000 with 70% sparsity. I am performing some multiplication, inverse operations upon it. While making calculations, does MATLAB make checks to see if matrix is ...