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Unformatted text preview: . Determine if A is a unit in M 2 ( Z n ) for n = 1 , 2 , 3 ,..., 10 and nd its inverse. Exercise 3. Use the correspondence principle to draw the subgroup lattice of Z 84 . [ Hint: Start with the lattice of subgroups of Z that contain h 84 i .]...
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- Spring '10