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In algebra, the dual numbers are a hypercomplex number system first introduced in the 19th century. They are expressions of the form a + bε , where a and b are real numbers , and ε is a symbol taken to satisfy ε 2 = 0 {\displaystyle \varepsilon ^{2}=0} with ε ≠ 0 {\displaystyle \varepsilon \neq 0} .
Dual (abbreviated DU) is a grammatical number that some languages use in addition to singular and plural.When a noun or pronoun appears in dual form, it is interpreted as referring to precisely two of the entities (objects or persons) identified by the noun or pronoun acting as a single unit or in unison.
The singular-dual may also be found in verbs: Hopi verbs distinguish singular-dual and plural (3+), while Hopi pronouns distinguish singular and plural (2+). The dual can be represented with a plural pronoun combined with a singular-dual verb. This phenomenon has been called a constructed number [261] or a Frankendual. [262]
Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.
Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. In English and many other languages, they are used to coin numerous series of words.
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In a dual agency situation, the same real estate agent represents both the buyer and the seller of a home. This arrangement can be risky for buyers, since agents are paid based on how much the ...
A split-complex number is an ordered pair of real numbers, written in the form ... "Double and dual numbers", Encyclopaedia of Mathematics, Soviet/AMS/Kluwer, Dordrect.