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duki
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Homework Statement
Recall that Vm is the set of all invertibles in Z/m
a) List the elements in V15
b) Find all the subgroups of V15
c) Is V15 cyclic? why?
Homework Equations
The Attempt at a Solution
From my notes:
a) V15 = {1, 2, 4, 7, 8, 11, 13, 14}
b) {2,4,8,1}{4,1}{7,4,13,1}{11,1}{14,13}{1}
c) No, no generator for whole group.
To be honest, I don't understand how any of these answers were found. I'm lost