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It is the smallest number, s, such that x <= s for any element, x, of the set; and if e is any number, however small, then there is at least one element in the set such that x > (s - e) : that is, (s - e) is not an upper bound.

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What is hierarchy of real numbers?

a real numbers computable if it is limit of an effectively converging computable sequence of a retional supremum infimum computable if it is supremum of computable of sequence of a rational numbers


Is the intersection of the set of rational numbers and the set of whole numbers is the set of rational numbers?

No, it is not.


Are natural numbers the same of rational numbers?

The set of rational numbers includes the set of natural numbers but they are not the same. All natural numbers are rational, not all rational numbers are natural.


What is a supremum or least upper bound?

The supremum, or least upper bound, of a set is the smallest value that is greater than or equal to every element in that set. It may or may not be an element of the set itself. For example, the supremum of the set of all real numbers less than 2 is 2, even though 2 is not included in the set. The concept is crucial in mathematical analysis and helps in understanding limits and convergence.


Are integers in a set of rational numbers?

Yes - the set of integers is a subset of the set of rational numbers.


A set of numbers combining rational and irrational numbers?

The Real numbers


Derived Set of a set of Rational Numbers?

The derived set of a set of rational numbers is the set of all limit points of the original set. In other words, it includes all real numbers that can be approached arbitrarily closely by elements of the set. Since the rational numbers are dense in the real numbers, the derived set of a set of rational numbers is the set of all real numbers.


What is set of rational numbers union with integers?

It is the rational numbers.


Does a real number contain the set of rational numbers?

No. A real number is only one number whereas the set of rational numbers has infinitely many numbers. However, the set of real numbers does contain the set of rational numbers.


How are rational numbers and integal numbers related to set of real numbers?

Both rational numbers and integers are subsets of the set of real numbers.


Is the set of rational numbers finite?

No; there are infinitely many rational numbers.


How are rational number different from fractional and whole number?

The set of rational numbers is the union of the set of fractional numbers and the set of whole numbers.