According to U.S. News & World Report 2014, HKU Mathematics ranks 9th in the "Best Global Universities Rankings".
The discipline "Mathematics" defined here includes journals dealing with statistics, probability and pure and applied mathematics make up the mathematics category. From algorithmic matrices and graph theory to cryptography and optimization, publications within this category focus on the science of quantity.
View the full list of U.S. News on best global universities for Mathematics:
http://www.usnews.com/education/best-global-universities/mathematics