**Characterizations of the exponential function** — In mathematics, the exponential function can be characterized in many ways. The following characterizations (definitions) are most common. This article discusses why each characterization makes sense, and why the characterizations are independent … Wikipedia

**Characterizations of the category of topological spaces** — In mathematics, a topological space is usually defined in terms of open sets. However, there are many equivalent characterizations of the category of topological spaces. Each of these definitions provides a new way of thinking about topological… … Wikipedia

**Algorithm characterizations** — The word algorithm does not have a generally accepted definition. Researchers are actively working in formalizing this term. This article will present some of the characterizations of the notion of algorithm in more detail. This article is a… … Wikipedia

**Alexandrov topology** — In topology, an Alexandrov space (or Alexandrov discrete space) is a topological space in which the intersection of any family of open sets is open. It is an axiom of topology that the intersection of any finite family of open sets is open. In an … Wikipedia

**Scientific method** — … Wikipedia

**Algorithm** — Flow chart of an algorithm (Euclid s algorithm) for calculating the greatest common divisor (g.c.d.) of two numbers a and b in locations named A and B. The algorithm proceeds by successive subtractions in two loops: IF the test B ≤ A yields yes… … Wikipedia

**Uncountable set** — Uncountable redirects here. For the linguistic concept, see Uncountable noun. In mathematics, an uncountable set is an infinite set that contains too many elements to be countable. The uncountability of a set is closely related to its cardinal… … Wikipedia

**e (mathematical constant)** — Euler s number redirects here. For γ, a constant in number theory, see Euler s constant. For other uses, see List of topics named after Leonhard Euler#Euler numbers. e is the unique number a, such that the derivative of the exponential function… … Wikipedia

**Amos 'n' Andy** — was a situation comedy based on stereotypes of African Americans and popular in the United States from the 1920s through the 1950s. The show began as one of the first radio comedy serials, written and voiced by Freeman Gosden and Charles Correll… … Wikipedia

**Robertson–Seymour theorem** — In graph theory, the Robertson–Seymour theorem (also called the graph minor theorem[1]) states that the undirected graphs, partially ordered by the graph minor relationship, form a well quasi ordering.[2] Equivalently, every family of graphs that … Wikipedia