All JavaScript programming happens in an environment like a web browser, Node, or Bun.js. Each of these environments has its own set of pre-defined variables like window and console.

Nowadays JavaScript has three different keywords to declare a variable — var, let and, const. Each has its own properties and particularities. Let’s start by making a simple comparison table ...

In the paper, we establish and study Hardy spaces with variable exponents on spaces of homogeneous type (X, d, μ) in the sense of Coifman and Weiss, where d may have no any regularity property and μ ...