This article presents five concise proofs of theorems on probability theory, mathematical statistics and stochastic processes. The proofs are more comprehensible and simpler than conventional ones.

本文裒集概率论、数理统计、随机过程若干定理的简捷证法，共五款。

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Regional dossiers that aim at providing concise descriptive information and basic educational statistics about minority language education in a specific region of the European Union.

UNESCO: Mercator, Netherlands