TSP (Travelling Salesman Problem) is a famous problem described by the following question: Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city exactly once and returns to the origin city? Despite how simple it is to…

I love learning about computer science, lately I’ve been studying about graph theory, I even took an online course about this topic, I try to understand every concept even if it takes me longer, and I have a lemma: “If you can’t code it, you haven’t understood it”. I think…

Article’s purpose Autodesk AutoCAD is a widely known program by engineers and designers used to create 2D and 3D models, it has a great interface with lots of options. It’s an intuitive easy-to-learn software which allows the user to achive great results fastly. CAD stands for Computed-Aided-Design, and Auto for Autodesk. …

Regression is one of the most important statistical technique ever, almost every data analysis uses this method in some way. In a descriptive way, regression is used to see correlations in the data, but correlation doesn’t imply always causality, as we can see in this web. In this article we…

When I first heard about inferential statistics I was amazed by that topic, How can we take conclusions about the population with just samples of it? In some way it sounds like magic. Then someone taught me about the Central Limit Theorem and how to compare means with the t-test…

The purpose of this article is to use python code to explain concepts about isomorphism between graphs and related ideas such as automorphisms, cycle notation, vertex-transitive, and edge-transitive graphs. It’s important to mention that the presented algorithms are highly inefficient, this is related to the graph isomorphism problem, not yet…

An oloid is a three-dimensional curved geometric object that was discovered by Paul Schatz in 1929. It’s a ruled surface, the convex hull of a skeletal frame made by placing two linked congruent circles in perpendicular planes, so that the center of each circle lies on the edge of the…

How to make API calls from Excel and transform JSON response to a table. — Nobody can deny that Microsoft Excel is still a powerful tool even if you know Python, SQL, Javascript… It provides a super-friendly interface, has many functionalities and is a very popular software. On the other hand, being able to make API calls and process the response provides a new world…

ERPNext is the world’s best free and open source ERP. It’s easy to install and can be adapted to the needs of any kind of business in any country. — This opensource app can be easily setup for multiple companies, where each one has their own site and SQL database. It allows the creation of users with different permission roles. Some of other incredible features are: Automatic email predefined reports, API access, backups, integration with PayPal, Stripe, Shopify among others…