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Unformatted text preview: University of Colorado, Department of Physics PHYS3220, Fall 09, HW#12 due Wed, Nov 18, 2PM at start of class 1. Vectors (Total: 20 pts) a) (Griffiths, Problem A.1) Consider the ordinary vectors in 3D ( a x i + a y j + a z k ), with complex components. For each of the following three subsets find out whether or not it constitutes a vector space. If so, what is the dimension of the vector space? If not, why is it not a vector space? (i) The subset of all vectors with a z = 0. (ii) The subset of all vectors whose z-component is 1 (iii) The subset of all vectors whose components are all equal. b) Does the subset of all 2 2 matrices form a vector space? Assume the usual rules for matrix addition and multiplication by a scalar, namely: a b c d + e f g h = a + e b + f c + g d + h , a b c d = a b c d If it does not form a vector space, why not? If it does form a vector space, state the dimensionality and give an example of a set of basis vectors....
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- Fall '08