I aim to share feedback on many topics, including life in France, and technology experiments. Will try to make it interesting and fun.

### Collatz Sequence - part 3

On first post and second post parts, I set-up the mathematical context to prove Collatz conjecture.

### Collatz Sequence - part 2

On first post part , we got some intuition about Collatz sequence], that seems to be unproven yet. Let’s try to prove it mathematically.

### Collatz Sequence - part 1

Collatz sequence is a well known suite mathematical suite, remaining unproved as far as I know. Let’s play with it and discover some of its secrets.

### Visite d’un jardin chinois en Yvelines

Que faire le dimanche? Le repos dominical est parfois nécessaire, tout comme il est parfois très intéressant de sortir et de vivre une nouvelle expérience. C’est ce qui m’est arrivé dimanche dernier. Journée chaude, très estivale bien que nous soyons toujours au printemps. Une opportunité s’est présentée en la visite d’un jardin chinois dans les Yvelines. Ce jardin se nomme le jardin de Yili.

### A group score analytics of FIFA football world cup 2018

World cup football european meaning will start in June 2018. It’s time to get knowledged about rules and to foresee what could be the ouputs of the different groups.

### Some useful R functions you should add to your .Rprofile file

We all face moments where we feel as not being as smart as expected. You know, those times where we lack of spirit presence, and of connection with the real world. It sometimes happen with R too, and that’s the subject of today’s post. Let’s focus on some reccuring needs, and how to address them gracefully in a very concise and convenient way.

### My way through R hell

Being newbie or experienced on R, we all face many recurring issues with R syntax, R interpreter and R pitfalls. Patrick BURNS book is worth reading and allows to become really aware of many commons pitfalls. Nevertheless, I really believe that this ends up to be necessary but still insufficient. That’s why, I would like to share my way through R hell and describe here most important practices I stick to, and the reasons to do so.

### Preamble

All the terms are given and to be understood in the scope of AI. Many of them, have several meanings. Do not get trapped by the meaning. Know what you aim to.

### Experimenting chessboard influence

This is the last post of a 4 posts serie, dedicated to chessplay and more specifically to the battle of influence on the chessboard.
We are now trying to create a methodical appraoch to improve our chess play.