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Everything about Rational function

Ratio of polynomial functions

In mathematics, a rational function is any function that can be defined by a rational fraction, which is an algebraic fraction such that both the numerator and the denominator are polynomials. The coefficients of the polynomials need not be rational numbers; they may be taken in any field K. In this case, one speaks of a rational function and a rational fraction over K. The values of the variables may be taken in any field L containing K. Then the domain of the function is the set of the values of the variables for which the denominator is not zero, and the codomain is L. Wikipedia →

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  3. Pick up a classic book: Theorie des kommunikativen HandelnsThe most-reprinted book on the subject
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  5. Go sideways: Partial fraction decompositionA closely related topic
  6. Go sideways: Irreducible polynomialA closely related topic

📖 Definitions

Noun Any function expressible as the quotient of two (coprime) polynomials (and which thus has poles at a finite, discrete set of points which are the roots of the denominator).

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