Convergence of the randomized Kaczmarz method: the overdetermined consistent case

Notes:
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Further investigation:
A. Agaskar, C. Wang and Y. M. Lu, "Randomized Kaczmarz algorithms: Exact MSE analysis and optimal sampling probabilities," 2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP), Atlanta, GA, USA, 2014, pp. 389-393
Zhong-Zhi Bai, Wen-Ting Wu, "On convergence rate of the randomized Kaczmarz method," Linear Algebra and its Applications, Volume 553, 2018, pp. 252-269
Randomized Kaczmarz Method RKM