Some Useful Links
- Arxiv: Preprints open access.
- Mathscinet: Math reviews from the American Mathematical Society (subscription is required).
- ZbMath: Math reviews also (subscription is required).
- Overleaf: Online latex editor. If you wish you can open an account clicking in this link https://www.overleaf.com/signup?ref=b4288f624036
- Researchgate: A kind of social network for researchers.