1. Consider the mapping (,): R2 x R² → R defined by (u,v) = u³ Du, Vu, v € R², where = »-(62) such that d1, d2 >0. Prove that (,) is an inner product.
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- (b) Prove that the dual of c, is isometric to /'.Justify that (•, ·) defines an inner product on R?. the function (', ·) defined on R? as follows: (u, v) := 5u1v1 – 2u1V2 – 2uzv1 + 4uQV2, U1 where u = v1 V = E R? U2 V2Let θ : R^4 → R defined by θ(u) = sup{u1|, |u4|}. Determine if θ is a norm, a seminorm or none of the two for R^4
- For (a, B) E R?, define a function (-, -) : R² × R? → R by setting arr' + xy + Yx' + Byy' . 1. Find and sketch the set of (a, B) E R² for which (-, -) defines an inner product. 2. Is there is a choice of (a, B) e R? for which the vectors ). V2 are orthonormal with respect to (-, -)? 3. For this part of the question, you may assume that (-, -) is an inner product with a = orthogonality is defined in terms of this. 2 and B = 3, and that a. Starting from the canonical basis - (). () use Gram-Schmidt to find an orthonormal basis for R?. b. Compute the component of the vector (:) X = in the direction of e1. Hence write down the matrix that represents orthogonal projection onto the subspace spanned by e1.k) Find a Harmonic Conjugate v(x, y) = _ of u(x,y) = x² -y²Determine if the function defines an inner product on R², where u = (u, v) = ₁V₁ satisfies (u, v) = (v, u) does not satisfy (u, v) = (v, u) satisfies (u, v + w) = (u, v) + (u, w) does not satisfy (u, v + w) = (u, v) + (u, w) satisfies c(u, v) = (cu, v) > U does not satisfy c(u, v) = (cu, v) satisfies (v, v) ≥ 0, and (v, v) = 0 if and only if v = 0 does not satisfy (v, v) ≥ 0, and (v, v) = 0 if and only if v = 0 X (U₁U₂) and v = (V₁, V₂). (Select all that apply.)
- Let B_R = {(x,y,z) : x2+y2+z2≤R2} (first image) Make a suitable coordinate shift to show that (second image)Define a function f : C -> C by f(x+iy) = (x+2y) + i(3x+4y) for x,y in R. Show that f is additive (i. e. satisfies f(v+w) = f(v)+f(w) for v,w in C) but not linear as a map of complex vector spaces. Show however that if we define f as the map f : R^2 -> R^2 given by f(x,y) = (x+2y, 3x+4y) then f is linear as a map of real vector spaces.Consider inner-product =| f(x)g(x) dx defined for vector space C[-1, 1] , then for the function f(x) = 3 x the inner-product equals: -1 Select one: а. 6 O b. 3 О с. 1 O d. zero