(*) Let D: Pn(R) + Pn-1(R) be a linear map with the property that for any...
5. For t ER, define the evaluation map evt : Pn(R) + R given by evt(p(x)) = p(t). Here we consider R as the vector space R1. (a) Prove evt is a linear map. (b) For part (b), let n= 4. Write down a polynomial p e ker(ev3). (c) For any t, the set of polynomials Ut = {p E Pn(R) : p(t) = 0} is a subspace. What is the dimension of Ut (in terms of n)? Justify your...
What's the solution of d and e 1. Let T : Pn(R) + Pn+1(R) be defined: T(P(x)) = (x + 1)p(x + 2) bases {1, X, ..., (a) (2 marks) Show that T is a linear transformation. (b) (3 marks) Is T one-to-one? Describe ker(T). What is the rank of T? (c) (8 marks) Find a matrix representation for T with respect to the standard xn} for Pn and {1, 2, ..., xn+1} for Pn+1 if n = 4. (d)...
Hint: Apply the rank-nullity theorem to the linear map Pn → Rn+1 that sends p ?→ (p(x0), . . . , p(xn)). Then use the fact that if polynomial of degree ≤ n has n + 1 distinct roots, then it is the zero polynomial. (3 points) Application: polynomial interpolation. Let (20; yo), ..., (In; Yn) be n +1 points R2 with distinct x-coordinates. Show that there exists a unique polynomial p(t) of degree <n such that p(xi) = yi...
1. Let T : Pn(R) + Pn+1(R) be defined: T(P(x)) = (x + 1)p(x + 2) bases {1, X, ..., (a) (2 marks) Show that T is a linear transformation. (b) (3 marks) Is T one-to-one? Describe ker(T). What is the rank of T? (c) (8 marks) Find a matrix representation for T with respect to the standard xn} for Pn and {1, 2, ..., xn+1} for Pn+1 if n = 4. (d) (5 marks) Let D : Pn+1(R) +...
Q 1 Let D: P.(R) - P.(R) be the differentiation map Dp = p.Write down the n+1x n+1- matrix Mp of D relative to the usual ordered basis (P.. . Pr). Let C: P.(R) + R"+l be the isomorphism which sends polynomials to their (column) vector of coordinates with respect to the ordered basis (Po....Pn). Show that the column space of My is precisely C(Im(D)). More generally. CoD Mpoc as maps from P.(R) R+!
1. Let T : P (R) Pn+1(R) be defined: T(p()) = (x + 1)p(x + 2) (a) (2 marks) Show that T is a linear transformation. (b) (3 marks) Is T one-to-one? Describe ker(T). What is the rank of T? (c) (8 marks) Find a matrix representation for T with respect to the standard bases {1, 2, ..., 2"} for Pn and {1, 2, ..., xn+1} for Pn+1 if n = 4. (d) (5 marks) Let D : Pn+1(R) +...
1. Let T: Pn(R) + Pn+1(R) be defined: T(P(x)) = (x + 1)p(x + 2) (c) (8 marks) Find a matrix representation for T with respect to the standard bases {1, 2, ...,2"} for Pn and {1, 2, ...,xN+1} for Pn+1 if n = 4. (d) (5 marks) Let D : Pn+1(R) + Pn(R) be the derivative operator. What is the rank of DoT? Justify your answer. Describe ker(DoT). Is DoT one-to-one? (e) (5 marks) What is the rank of...
Please solve from a) to e), thank you. 1. Let R be a com ive ring of charact a) Prove that (x+y)P-y. [3] b) Deduce that the map фр: R R, фр(x)-x", is a ring homomorphism. [1] c) Compute Op in the case R is the ring Zp. [2] d) Prove that φp is injective if R has no zero-divisors. [2] e) Give an example of a commutative ring of characteristic p such that фр is not surjective. [3]
Help me with the C) please! Only the third one 1. Let R be a commutative ring of characteristic p, a prime a) Prove that (y)y. [3] b) Deduce that the map фр: R-+ R, фр(x)-z", is a ring homomorphism. 1] c) Compute Op in the case R is the ring Zp. [2] d) Prove that фр is injective if R has no zero-divisors. [2] e) Give an example of a commutative ring of characteristic p such that фр is...
1. Let Q be the set of polynomials with rational coefficients. You may assume that this is an abelian group under addition. Consider the function Ql] Q[x] given by p(px)) = p'(x), where we are taking the derivative. Show that is a group homomorphism. Determine the kernel of 2. Let G and H be groups. Show that (G x H)/G is isomorphic to H. Hint: consider defining a surjective homomorphism p : Gx HH with kernel G. Then apply the...