Strong law of large numbers is a fundamental theory in probability and statistics. When the measure tool is nonadditive, this law is very different from additive case. In 2010 Chen investigated the strong law of large numbers under upper probabilityVby assumingVis continuous. This assumption is very strong. Upper probabilities may not be continuous. In this paper we prove the strong law of large numbers for an upper probability without the continuity assumption whereby random variables are quasi-continuous and the upper probability is generated by a weakly compact family of probabilities on a complete and separable metric sample space.
 Z. Chen, “Strong Laws of Large Numbers for Capacities,” Unpublished, 2010. http://arxiv.org/abs/1006.0749
 S. Peng, “Nonlinear Expectations and Stochastic Calculus under Uncertainty-with Robust Central Limit Theorem and G-Brownian Motion,” Unpublished, 2012. http://arxiv.org/abs/1002.4546
 Z. Chen, P. Wu and B. Li, “A Strong Law of Large Numbers for Non-additive Probabilities,” International Journal of Approximate Reasoning, 2012. http://www.sciencedirect.com/science/article/pii/S0888613X12000783
 F. Hu, “General Laws of Large Numbers under Sublinear Expectations,” 2012. http://arxiv.org/abs/1104.5296
 Z. Chen and P. Wu, “Strong Laws of Large Numbers for Bernoulli Experiments under Ambiguity,” Nonlinear Mathematics for Uncertainty and Its Applications, Advances in Intelligent and Soft Computing, Vol. 100, 2011, pp. 19-30. http://link.springer.com/chapter/10.1007%2F978-3-642-22833-9_2?LI=true
 L. Denis, M. Hu and S. Peng, “Function Spaces and Capacity Related to a Sublinear Expectation: Application to G-Brownian Motion Paths,” Potential Analysis, Vol. 34, No. 2, 2011, pp. 139-161. doi:10.1007/s11118-010-9185-x