New posts in Periodic Functions

Is a broken clock right twice a day?

Is $f(x)=\sin(x^2)$ periodic?

How to find period of this periodic function?

Period of the sum/product of two functions

Integral of periodic function over the length of the period is the same everywhere

An integrable and periodic function $f(x)$ satisfies $\int_{0}^{T}f(x)dx=\int_{a}^{a+T}f(x)dx$.

Does the phrase "instantaneous frequency" make sense?

What is $\sum (x+\mathbb{Z})^{-2}$?