| http://www.w3.org/ns/prov#value | - s, prove that X Y = 0 iff X and Y are linearly dependent. 1-14 If a 11 a 12 a 13 T = a 21 a 22 a 23 0 0 1 represents a linear transformation of the plane under which distance is an invariant show that the following relations must hold : a 11 2 + a 21 2 = a 12 2 + a 22 2 = 1, and a 11 a 12 + a 21 a 22 = 0.
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