Polynomial over the Fields:
a) If p(x) an element of F[x] is not irreducible, then there are at least two polynomials g(x) and h(x), neither which is a constant, such that p(x)=g(x)h(x). Explain
b) Use problem a to prove: If p(x) is not irreducible, then p(x)=j(x)k(x), where both j(x) and k(x) are polynomials of lower degree than p(x).
Polynomial over the Fields: a) If p(x) an element of F[x] is not irreducible, then there are at least two polynomials g(x) and h(x), neither which is a constant, such that p(x)=g(x)h(x). Explain b) U...
Rings and fields- Abstract Algebra 2. (a) (6 points) Let f (x) be an n over a field F. Let irreducible polynomial of degree g() e Fx be any polynomial. Show that every irreducible factor of f(g()) E Flx] has degree divisible by n (b) (4 points) Prove that Q(2) is not a subfield of any cyclotomic field over Q. 2. (a) (6 points) Let f (x) be an n over a field F. Let irreducible polynomial of degree g()...
Let k be a field of positive characteristic p, and let f(x)be an irreducible polynomial. Prove that there exist an integer d and a separable irreducible polynomial fsep (2) such that f(0) = fsep (2P). The number p is called the inseparable degree of f(c). If f(1) is the minimal polynomial of an algebraic element a, the inseparable degree of a is defined to be the inseparable degree of f(1). Prove that a is inseparable if and only if its...
Problem 10.13. Recal that a polynomial p over R is an expression of the form p(x) an"+an--+..+ar +ao where each aj E R and n E N. The largest integer j such that a/ 0 is the degree of p. We define the degree of the constant polynomial p0 to be -. (A polynomial over R defines a function p : R R.) (a) Define a relation on the set of polynomials by p if and only if p(0) (0)...
Consider the polynomial f(x) = x p − x + 1 ∈ Zp[x]. (a) Let a be a root of f in some extension. Prove that a /∈ Zp and a + b is a root of f for all b ∈ Zp. (b) Prove that f is irreducible over Zp. [Hint: Assume it is reducible. If one of the factors has degree m, look at the coefficient of x m−1 and get a contradiction.]
14. If f(a) and g(x) are polynomials over the field F, and h(x)-f(x) t gx), prove that h(c)-f(c) + g(c) for all c in F. 15. If f(x) and g(x) are polynomials over the field F, and p(x)fx)g(x), prove that p(c) -f(c)g(c) for all c in F
5. Let F be a field, and let p(x) ∈ F [x] be a separable, irreducible polynomial of degree 3. Let K be the splitting field of p(x), and denote the roots of p(x) in K by α1, α2, α3. a) (10’) If char(F ) does not equal 2, 3, prove that K = F (α1 − α2).
Fields Suppose F=Q, K=Q(sqrt (3)) and E=Q(sqrt(12)). Find the minimum polynomials h(x) for sqrt(3) and g(x) for sqrt(12) over Q. K and E are in the same field. Explain why these two polynomials have no roots in common.
Problem 5. Give an example of an irreducible polynomial f ∈ K[x] which has roots a, b, c in its splitting field such that the fields K(a, b) and K(a, c) are not isomorphic over K.
Throughout this question, fix A as an n×n matrix. If f(x) is a polynomial, then f(A) is the expression formed by replacing every x in f(x) with A and inserting the n×n identity matrix I to its constant term. For example, if f(x) = x2 −2x+5 (whose degree is 2), then f(A) = A2 −2A+5I; if f(x) = −x3 +2 (whose degree is 3), then f(A) = −A3 + 2I. (a) Using induction of the degree of the polynomial f(x),...
Problem Six: Given two polynomials: g(x) = anx" + an-iz"-1 +--+ aix + ao Write a MATLAB function (name it polyadd) to add the two polynomials and returns a polynomial t(x) = g(x) + h(x), whether m = n, m < n or m > n. Polynomials are added by adding the coefficients of the terms with same power. Represent the polynomials as vectors of coefficients. Hence, the input to the function are the vectors: g=[an an-1 ao] and h=[am...