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German mathematician Carl Friedrich Gauss said, "Mathematics is the queen of the sciences—and number theory is the queen of mathematics." Number theory also studies the natural, or whole, numbers. One of the central concepts in number theory is that of the prime number , and there are many questions about primes that appear simple but whose ...
This page will attempt to list examples in mathematics. To qualify for inclusion, an article should be about a mathematical object with a fair amount of concreteness. Usually a definition of an abstract concept, a theorem, or a proof would not be an "example" as the term should be understood here (an elegant proof of an isolated but particularly striking fact, as opposed to a proof of a ...
In mathematics, the term "trivial" is often used to refer to objects (e.g., groups, topological spaces) with a very simple structure. These include, among others: Empty set: the set containing no or null members; Trivial group: the mathematical group containing only the identity element; Trivial ring: a ring defined on a singleton set
It is not just heavy metals which can be toxic; other metals (for example beryllium and lithium) can be toxic too. [268] Sleeping in a closed room with an electric fan running does not result in "fan death", as is widely believed in South Korea among older people. [269] [270] As of 2019 this belief was in decline. [271]
Trivia is information and data that are considered to be of little value. Modern usage of the term trivia dates to the 1960s, when college students introduced question-and-answer contests to their universities.
For example, the position of a planet is a function of time. Historically , the concept was elaborated with the infinitesimal calculus at the end of the 17th century, and, until the 19th century, the functions that were considered were differentiable (that is, they had a high degree of regularity).
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25 is a square. It is a square number, being 5 2 = 5 × 5, and hence the third non-unitary square prime of the form p 2.. It is one of two two-digit numbers whose square and higher powers of the number also ends in the same last two digits, e.g., 25 2 = 625; the other is 76.