Computer Science

Solving the Generalized Eigenvalue Problem in C with GSL and LAPACK: An Application in Quantum Mechanics

12 min read

Algorithms
C
Quantum Mechanics

Solving the Generalized Eigenvalue Problem in C with GSL and LAPACK: An Application in Quantum Mechanics

Francisco Yepes Barrera August 14, 2025

Problem Definition The eigenvalue problem is an essential component of many numerical methods, especially in science and...

Debian 13 Trixie Released

2 min read

Linux

Debian 13 Trixie Released

Francisco Yepes Barrera August 13, 2025

Debian 13, called Trixie, is the new stable version of the Linux operating system officially released on...

Updating Emacs (Spacemacs) from Command Line

6 min read

Bash
Emacs

Updating Emacs (Spacemacs) from Command Line

Francisco Yepes Barrera August 12, 2025

I’ve been using Spacemacs for years. Spacemacs is addressed to Vim (through evil mode) and Emacs users...

Why Did Perl Never Catch On? A Nostalgic Look at Software Development

13 min read

Perl
Python

Why Did Perl Never Catch On? A Nostalgic Look at Software Development

Francisco Yepes Barrera August 2, 2025

There’s More Than One Way To Do It Perl is a programming language created in 1987 by...

Weather Forecasting in the Terminal using wttr.in and Perl

3 min read

Perl

Weather Forecasting in the Terminal using wttr.in and Perl

Francisco Yepes Barrera August 1, 2025

Using the wttr.in service, you can get weather forecasts on your terminal. The following Perl script (weather.pl)...

Transpose of a Matrix in Perl

2 min read

Perl

Transpose of a Matrix in Perl

Francisco Yepes Barrera July 31, 2025

The following script performs the transposition of a matrix in Perl. Launched without arguments, the program transpose.pl...

Moore’s Law

1 min read

Miscellaneous

Moore’s Law

Francisco Yepes Barrera June 26, 2025

In 1965, in a famous article, Gordon Moore, co-founder of Intel, proposed that the number of transistors...

Normalizing Datasets in Perl

3 min read

Perl

Normalizing Datasets in Perl

Francisco Yepes Barrera February 22, 2024

The following code in Perl performs the normalization of a dataset of numerical data. For each record,...

Gray Code

3 min read

Algorithms
C
Genetic Algorithms

Gray Code

Francisco Yepes Barrera February 17, 2024

Introduction Integer conversion between bases 10 and 2 (binary) is necessary and extensively used in many areas...

Calculation of the Golden Ratio with Maxima

1 min read

Algorithms

Calculation of the Golden Ratio with Maxima

Francisco Yepes Barrera August 26, 2020

Euclid defined the golden section or golden ratio in the following way: Split a segment into two...

Computer Science

Solving the Generalized Eigenvalue Problem in C with GSL and LAPACK: An Application in Quantum Mechanics

Debian 13 Trixie Released

Updating Emacs (Spacemacs) from Command Line

Why Did Perl Never Catch On? A Nostalgic Look at Software Development

Weather Forecasting in the Terminal using wttr.in and Perl

Transpose of a Matrix in Perl

Moore’s Law

Normalizing Datasets in Perl

Gray Code

Calculation of the Golden Ratio with Maxima

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