I am interested to know where and from who I can learn about the use of counting a set of numbers modulo M and observing the resulting sets' periods, etc. I know that there is muc …

Let $f:\mathbb R\to\mathbb R$ be a periodic function. We say $f$ is without minimum period if, $\forall t$ such that $f(x+t)=f(x)\forall x$, there is a $t'$ such that $0 Is there …

Hello, I have come across the function $f(t) = \sum_{j=1}^n c_j e^{2 \pi i a_j t}$ with $c_j \in \mathbb{C}$, $c_j\neq 0$ and $a_j\in\mathbb{R}$, $a_j \neq 0$ for $j=1,...,n$, a …

This is a simple question, but its been bugging me. Define the function $\gamma$ on $\mathbb{R}\backslash \mathbb{Z}$ by $$\gamma(x):=\sum_{i\in \mathbb{Z}}\frac{1}{(x+i)^2}$$ The …