INSTITUTUM MATHEMATICUM · ACADEMIA SCIENTIARUM POLONA
ACTA
ARITHMETICA
ISSN: 0065-1036(p) 1730-6264(e)
Coincidences in the values of the Euler and Carmichael functions
William D. Banks1, John B. Friedlander2, Florian Luca3, Francesco Pappalardi4, Igor E. Shparlinski5 Acta Arith. 122 (2006), 207-234
doi:10.4064/aa122-3-1