Instructor's Solution Manual for "Applied Linear Algebra" by Peter J. Olver, Chehrzad Shakiban

By Peter J. Olver, Chehrzad Shakiban

Resolution guide for the ebook utilized Linear Algebra via Peter J. Olver and Chehrzad Shakiban

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One example is f (x) ≡ 0 and g(x) = x3 − x. 6. (a) f (x) = − 4 x + 3; (b) f (x) = − 2 x2 − x + 1. 7. ! 1 ex , which is a constant function. , and (a) 3 cos y ! − 5 x + 5 y − 5 ex − 5 x − y + ex + 1 . Multiplied by − 5 is (b) Their sum is − 5 x y − 5 cos y − 15 x y + cos y + 3 ! 0 . 8. This is the same as the space of functions F(R 2 , R 2 ). Explicitly: Commutativity of Addition: ! ! w1 (x, y) v1 (x, y) + w1 (x, y) w1 (x, y) v1 (x, y) + = = + w2 (x, y) v2 (x, y) + w2 (x, y) w2 (x, y) v2 (x, y) Associativity of Addition: !

Given any square matrix, write A = S + J where S = 12 A + AT is symmetric and “ ” J = 12 A − AT is skew-symmetric. This verifies the two conditions for complementary subspaces. 24(d). 28. (a) By induction, we can show that f (n) (x) = Pn 1 x ! e− 1/x = Qn (x) e− 1/x , xn where Pn (y) and Qn (x) = xn Pn (1/x) are certain polynomials of degree n. Thus, lim f (n) (x) = lim Qn (x) x→0 x→0 e− 1/x = Qn (0) y lim y n e− y = 0, →∞ xn because the exponential e− y goes to zero faster than any power of y goes to ∞.

C a = (c a1 , c a2 , c a3 , . . ). Explicity verification of the vector space properties is straightforward. An alternative, smarter strategy is to identify R∞ as the space of functions f : N → R where N = { 1, 2, 3, . . } is the set of natural numbers and we identify the function f with its sample vector f = (f (1), f (2), . . ). 11. (i) v + (−1)v = 1 v + (−1)v = 1 + (−1) v = 0 v = 0. (j) Let z = c 0. Then z + z = c (0 + 0) = c! 0 = z, and so, as in the proof of (h), z = 0. 1 1 1 (k) Suppose c = 0.

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