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In mathematics, a polynomial is a mathematical expression consisting of indeterminates (also called variables) and coefficients, that involves only the operations of addition, subtraction, multiplication and exponentiation to nonnegative integer powers, and has a finite number of terms.
Addition and subtraction are performed by adding or subtracting two of these polynomials together, and reducing the result modulo the characteristic. In a finite field with characteristic 2, addition modulo 2, subtraction modulo 2, and XOR are identical.
In mathematics, a finite field or Galois field (so-named in honor of Évariste Galois) is a field that contains a finite number of elements.As with any field, a finite field is a set on which the operations of multiplication, addition, subtraction and division are defined and satisfy certain basic rules.
An interesting question is whether there are other additive polynomials except these linear combinations. The answer is that these are the only ones. One can check that if P(x) and M(x) are additive polynomials, then so are P(x) + M(x) and P(M(x)). These imply that the additive polynomials form a ring under polynomial addition and composition ...
Subtraction is itself a sort of inverse to addition, in that adding x and subtracting x are inverse functions. Given a set with an addition operation, one cannot always define a corresponding subtraction operation on that set; the set of natural numbers is a simple example.
Minimal polynomials are useful for constructing and analyzing field extensions. When α is algebraic with minimal polynomial f(x), the smallest field that contains both F and α is isomorphic to the quotient ring F[x]/ f(x) , where f(x) is the ideal of F[x] generated by f(x). Minimal polynomials are also used to define conjugate elements.
This includes polynomials with real coefficients, since every real number is a complex number with an imaginary part equal to zero. Equations – equality of two mathematical expressions; Linear equation – an algebraic equation with a degree of one; Quadratic equation – an algebraic equation with a degree of two
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