Doctoral studies means advanced studies in mathematics or mathematical statistics by way of reading courses and working with a research project of your own.
When you have passed the exam you have a doctoral degree, and have either the possibility to continue within the universities, or to launch a career in industry and business. It is also possible to take a licentiate degree after half the time of the education.
Mathematical Sciences is an integrated department within the University of Gothenburg and Chalmers University of Technology, and to be employed as a doctoral student you must first be admitted to either a third-cycle subject at the University of Gothenburg or a graduate school at Chalmers University of Technology. It works almost in the same way at both universities.