• Some Divisibility Properties of the Euler Function 

    Banks, William David, 1964-; Luca, Florian; Shparlinski, Igor E. (Oxford University Press, 2005)
    Let '(・) denote the Euler function, and let a > 1 be a fixed integer. We study several divisibility conditions which exhibit typographical similarity with the standard formulation of the Euler theorem, such as a n ≡ 1 ...