信賴區間水平的正态置信区间为: ( x ¯ − z α / 2 σ n , x ¯ + z α / 2 σ n ) {\displaystyle \left({\bar {x}}-z_{\alpha /2}{\frac {\sigma }{\sqrt {n}}},{\bar {x}}+z_{\alpha /2}{\frac
维拉宿代数m + n {\displaystyle [{\bar {l}}_{m},{\bar {l}}_{n}]=(m-n){\bar {l}}_{m+n}} , [ l m , l ¯ n ] = 0 {\displaystyle [l_{m},{\bar {l}}_{n}]=0} . 对于一李代数