The garrison is not up to its full number. The comic routine followed the dance number. For her third number she played a nocturne. Did you call the right number?

Cofinite set Throughout mathematics, "almost all" is sometimes used to mean "all elements of an infinite set but finitely many". Almost all positive integers are greater than 1,, Almost all polyhedra are irregularas there are only nine exceptions: Meaning in measure theory[ edit ] Further information: Almost everywhere The Cantor function When speaking about the realssometimes "almost all" means "all reals but a null set ".

In the more general case of an n-dimensional space where n is a positive integerthese definitions can be generalised to "all points but those in a null set" [sec 3] or "all points in S but those in a null set" this time, S is a set of points in the space.

In a measure spacesuch as the real line, countable sets are null. The set of rational numbers is countable, and thus almost all real numbers are irrational.

Thus, almost all reals are not members of it even though it is uncountable.

Meaning in number theory[ edit ] Further information: Asymptotically almost surely In number theory"almost all positive integers" can mean "the positive integers in a set whose natural density is 1".

That is, if A is a set of positive integers, and if the proportion of positive integers below n that are in A out of all positive integers below n tends to 1 as n tends to infinity, then almost all positive integers are in A. If A is a subset of S, and if the proportion of elements of S below n that are in A out of all elements of S below n tends to 1 as n tends to infinity, then it can be said that almost all elements of S are in A.

The natural density of cofinite sets of positive integers is 1, so each of them contains almost all positive integers. Almost all positive integers are composite. The proportion of graphs with n vertices that are in A equals the probability that a random graph with n vertices chosen with the uniform distribution is in A, and choosing a graph in this way has the same outcome as generating a graph by flipping a coin for each pair of vertices to decide whether to connect them.

The use of the term "almost all" in graph theory is not standard; the term " asymptotically almost surely " is more commonly used for this concept. Almost all graphs are asymmetric.

Some use a more limited definition, where a subset only contains almost all of the space's points if it contains some open dense set. Given an irreducible algebraic varietythe properties that hold for almost all points in the variety are exactly the generic properties.

Meaning in algebra[ edit ] In abstract algebra and mathematical logicif U is an ultrafilter on a set X, "almost all elements of X" sometimes means "the elements of some element of U".

It is possible to think of the elements of a filter on X as containing almost all elements of X even if it isn't an ultrafilter. Mathematical Surveys and Monographs.

Non-Noetherian Commutative Ring Theory. Mathematics and Its Applications.Examples of Irrational Numbers. Just as numbers that can be written as one integer divided by another integer are rational numbers, there are also numbers that are irrational numbers.

All numbers that are not rational are considered irrational. An irrational number can be written as a decimal, but not as a fraction. An irrational number has endless non-repeating digits to . More on Irrational Numbers. It might seem that the rational numbers would cover any possible number.

After all, if I measure a length with a ruler, it is going to come . Learning algebra is a little like learning another language. In fact, algebra is a simple language, used to create mathematical models of real-world situations and .

Irrational Number. An irrational number is a number that cannot be expressed as a fraction for any integers plombier-nemours.comonal numbers have decimal expansions that neither terminate nor become periodic.

Every transcendental number is irrational.. There is no standard notation for the set of irrational numbers, but the notations,, or, where the bar, minus sign, or backslash indicates the set.

An irrational number cannot be expressed as a ratio between two numbers and it cannot be written as a simple fraction because there is not a finite number of numbers when written as a decimal.

Instead, the numbers in the .

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Irrational number - Wikipedia