( m + 1 ) E m ( z )

= 2 m + 1 ( B m + 1 ( z + 1 2 ) B m + 1 ( z 2 ) )

m E m 1 ( z )

= 2 B m ( z ) 2 m + 1 B m ( z 2 )

( m + 1 ) E m ( 0 )

= ( 2 2 m + 2 ) B m + 1

m E m 1 ( z )

= 2 m ( B m ( z + 1 2 ) B m ( z 2 ) )

E m ( B ( z ) )

= : 2 m B m ( z 2 ) = : 2 m ( B ( 0 ) + z 2 ) m

E m ( B ( z ) )

= : B m ( E ( z ) )