2. Suppose V is a vector space and U is a subspace. Consider the following statement:...
a. Let W and X both be subspaces of a vector space V. Prove that dim(WnX) > dim(W) + dim(X) - dim(V) b. Define a plane in R" (as a vector space) to be any subspace of dimension 2, and a line to be any subspace of dimension 1. Show that the intersection of any two planes in R' contains a line. c. Must the intersection of two planes in R* contain a line?
Problem 1. Given the vector space P the basis B -<1,7,',r'> of P, let U - span[1,2]. V-span c and W -spanr x '] Which of the following statements is true? 1. UV = 0 2. UUV is a vector subspace of P -P 3. U nW - and for any vector subspace P of P UW SPP 4. UUW = P. 5. All except statement 3 is false. Problem 2. Consider the function P, R such that f(1-r) -...
Problem 3. Let V and W be vector spaces, let T : V -> W be a linear transformation, and suppose U is a subspace of W (a) Recall that the inverse image of U under T is the set T-1 U] := {VE V : T(v) E U). Prove that T-[U] is a subspace of V (b) Show that U nim(T) is a subspace of W, and then without using the Rank-Nullity Theorem, prove that dim(T-1[U]) = dim(Unin (T))...
Problem 1. Given the vector space Pa, the basis B =< 1,7,22,,24 > of Pd, let U = span[1, 2], V = span[22, 1) and W = span[r2,, ). Which of the following statements is true? 1. UmV = 0 2. UUV is a vector subspace of P. 3. U W = 0 and for any vector subspace P of PA, U, W CP 4. UUW =P 5. All except statement 3 is false. P =P.
1 Problem 4. Let V be a vector space and let U and W be two subspaces of V. Let (1) Prove that ifU W andWgU then UUW is not a subspace of V (2) Give an example of V, U and W such that U W andWgU. Explicitly verify the implication of the statement in part1). (3) Proue that UUW is a subspace of V if and only if U-W or W- (4) Give an example that proues the...
Suppose that U and V are subspaces of a vector space W. Then UnV is a subspace of both U and V, and U and V are both subspaces of U +V. Show that (U+ V)/U ~ V/(UnV) Suppose that U and V are subspaces of a vector space W. Then UnV is a subspace of both U and V, and U and V are both subspaces of U +V. Show that (U+ V)/U ~ V/(UnV)
The answer is not C Suppose U is the subspace of the vector space R4 with basis {(1,1,1,2)), and V is the solution space to the system of equations 2+y-2- = 0 2-y-2+ = 0 Define the set U+V = {u+vlu EU,VEV}. Which of the following is true? I. V has dimension 1. II. U + V has dimension 2. III. A basis for U+V is {(1,1,1,2), (1,1,1,1),(1,0,1,0)}. (A) I only (B) II only (C) III only (D) I and...
3. Determine if each set is a subspace of the space of degree < 2 polynomials. If so, provide a basis for the set. (a) Degree s 2 polynomial functions whose degree 1 coefficient is zero: $(x) = ax2 + c where a,CER. (b) Degree s 2 polynomial functions whose degree 1 coefficient is 1: f(x) = ax2 + x + c where a,CER.
Suppose that {ū1, ... , ūk} is a basis for a subspace W of R" and that the vector Ū E span{ū1, ... , ūk}. Then û = Proj, Ū = ū. True O False Suppose that W is a subspace of R" and that the vector ŪER" .Then if û = Projű we have Ilu - Oll < 110 - ūll for all vectors ū EW . That is, <- is the vector in W that is closest to...
1.14 Consider events ArAg, Avon a sample space Ω. (a) Suppose A, c A-... c AN . Evaluate P(AIA)for i < j and for i > (b) Evaluate the set CAnd D1 A (c) Prove/Disprove: N-1 n AN ) = 1.