Mโก(a,b,x)=ฮ“โก(b)โขe12โขxโข((12โขbโˆ’a)โขx)12โˆ’12โขbโข(Jbโˆ’1โก(2โขxโข(bโˆ’2โขa))+envโกJbโˆ’1โก(2โขxโข(bโˆ’2โขa))โขOโก(|a|โˆ’12)),