What is an even function? Not only even functions, odd functions are also of great interest. Let's learn about these two concepts together!

Passwords are still dominated by simple structure, and there is a significant increase of using only numbers as passwords. the progress of password security over the previous decade, which shows that ...

Let ø denote Euler's phi function. For a fixed odd prime q we investigate the first and second order terms of the asymptotic series expansion for the number of n ⩽ x such that q ∤ ø (n). Part of the ...