In this paper, We give a geometrical definition of conditional expectation. Identity of the definition and other definitions is discussed.
本文给出了条件数学期望的几何定义，证明了该定义与其它定义的一致性。
In this paper, We give a geometrical definition of conditional expectation. Identity of the definition and other definitions is discussed.
本文给出了条件数学期望的几何定义，证明了该定义与其它定义的一致性。
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