I'm thinking of enrolling in a Master's degree in Mathematics and it culminates with a thesis rather than being purely course-based. I am wondering what is expected of students writing a Master's thesis and how it compares to a Bachelor's/PhD thesis. For my Bachelor's thesis, a literature review was sufficient. How much (if any) original research and results are required in a Master's thesis? I expect that it varies by country but I am still interested in expectations in all different countries, not just limited to my country (Netherlands).
My specific program is in applied mathematics, and the thesis is supposed to written over one semester (4-5 months).