let a, b be Real; :: thesis: ( a > 1 & b > 0 implies a #R b > 1 )
assume that
A1: a > 1 and
A2: b > 0 ; :: thesis: a #R b > 1
a #R b > a #R 0 by A1, A2, Th83;
hence a #R b > 1 by A1, Th71; :: thesis: verum