均匀分布叠加与正态分布叠加

1 理论 1.1 两个正态分布之和为正态分布 1.2 均匀分布相减php x 2 ∼ U ( 0 , 1 ) x 2 ∼ U ( 0 , 1 ) z = x 1 − x 2 \begin{array}{l} {x_{2}} & {\sim U(0,1)} \\ {x_{2}} & {\sim U(0,1)} \\ {z} & {=x_{1}-x_{2}}\end{array

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