This document is a collection of proposed problems, solutions and research made along the recently finished year 2023.
In many cases the subjects are not treated in full detail, sometimes for a lack of time, in other cases it may be intended to be completed by the reader.
It is possible, according to the response of the audicence, that I publish further versions of this document, with corrections, completions or enhancements.
Send your remarks and suggestions to garciacapitan@gmail.com
Some portions of the document are written in Spanish.
