Let a₁₁₁ :Z→Z₁₁₁ be the natural homomorphism given by a₁₁₁ (a)= (the remainder of a when divided by m) for a∈Z. What does a₁₁₁ represent?
a) Exponential function
b) Logarithmic function
c) Modular arithmetic function
d) Trigonometric function