EN
EULER'S TOTIENT FUNCTION AND THE THEOREM OF EULER
§ 1. Euler's totient function
§ 2. Properties of Euler's totient function
§ 3. The theorem of Euler
§ 4. Numbers which belong to a given exponent with respect to a given modulu
§ 5. Proof of the existence of infinitely many primes in the arithmetical progression nk+1
§ 6. Proof of the existence of the primitive root of a prime number
§ 7. An nth power residue for a prime modulus p
§ 8. Indices, their properties and applications