Question 4 Describe all groups having exactly 4 elements up to isomorphism. Justify your answer and show all work. (Hint. Unlike the cases of 2- and 3-element groups discussed in class, there will be more than one table consistent with the group axioms. However, some of these tables will be the same up to a change of notation! So if you have two (or more) tables, you have to either find a change of notation that turns one table into the other, or you have to argue that no such change of notation can possibly exist. If there is a change of notation, keep only one of the two tables.)

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Question 4 Describe all groups having exactly 4 elements up to isomorphism. Justify your
answer and show all work.
(Hint. Unlike the cases of 2- and 3-element groups discussed in class, there will be more than
one table consistent with the group axioms. However, some of these tables will be the same up
to a change of notation! So if you have two (or more) tables, you have to either find a change of
notation that turns one table into the other, or you have to argue that no such change of notation
can possibly exist. If there is a change of notation, keep only one of the two tables.)
Transcribed Image Text:Question 4 Describe all groups having exactly 4 elements up to isomorphism. Justify your answer and show all work. (Hint. Unlike the cases of 2- and 3-element groups discussed in class, there will be more than one table consistent with the group axioms. However, some of these tables will be the same up to a change of notation! So if you have two (or more) tables, you have to either find a change of notation that turns one table into the other, or you have to argue that no such change of notation can possibly exist. If there is a change of notation, keep only one of the two tables.)
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