扰动次数

扰动形式

扰动参数取值

生成函数

二次

k = 1 2 α k ( z k + z k 2 ) + 1

α 1 = 9 4

α 2 = 3 8

S = ( 1 + z ) 6 ( 3 18 z + 38 z 2 18 z 3 + 3 z 4 ) 256 z 5

三次

k = 1 3 α k ( z k + z k 2 ) + 1

α 1 = 15 α 3 9 4

α 2 = 6 α 3 + 3 8

S = 2 z 3 ( 1 + z ) 6 ( α 3 z 3 + ( 6 α 3 + 3 8 ) z 2 + ( 15 α 3 9 4 ) z 1 + ( 19 4 20 α 3 ) + ( 15 α 3 9 4 ) z + ( 6 α 3 + 3 8 ) z 2 + α 3 z 3 ) 2 6 α 3 为任意值

四次

k = 1 4 α k ( z k + z k 2 ) + 1

α 1 = 15 α 3 + 64 α 4 9 4

α 2 = 6 α 3 20 α 4 + 3 8

S = 2 z 3 ( 1 + z ) 6 ( ( 3 160 1 20 α 2 3 10 α 3 ) z 4 + α 3 z 3 + α 2 z 2 + ( 21 20 16 5 α 2 21 5 α 3 ) z 1 + ( 19 4 20 α 3 90 α 4 ) + ( 21 20 16 5 α 2 21 5 α 3 ) z + α 2 z 2 + α 3 z 3 + ( 3 160 1 20 α 2 3 10 α 3 ) z 4 ) 2 6 α 3 , α 4 为任意值