ハイパーE表記
E ( b ) a = b a {\displaystyle E(b)a=b^{a}}
E ( b ) a 1 # a 2 # ⋯ # a n # 1 = E ( b ) a 1 # a 2 # ⋯ # a n {\displaystyle E(b)a_{1}\#a_{2}\#\cdots \#a_{n}\#1=E(b)a_{1}\#a_{2}\#\cdots \#a_{n}}
E ( b ) a 1 # ⋯ # a n − 2 # a n − 1 # a n = E ( b ) a 1 # ⋯ # a n − 2 # ( E ( b ) a 1 # ⋯ # a n − 2 # a n − 1 # ( a n − 1 ) ) {\displaystyle E(b)a_{1}\#\cdots \#a_{n-2}\#a_{n-1}\#a_{n}=E(b)a_{1}\#\cdots \#a_{n-2}\#(E(b)a_{1}\#\cdots \#a_{n-2}\#a_{n-1}\#(a_{n}-1))}