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accepted Showing the set $A+B$ is closed.
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comment Showing the set $A+B$ is closed.
ok thanks! that was really cool. I didnt know much about embeddings.
Apr
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comment Combinatoric Graph
Yes, although you are missing $\{a,b,c\}$. Then for each one draw a point and which do you connect to which?
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comment Combinatoric Graph
First step: What are the subsets of $\{a,b,c\}$?
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answered Isomorphisms between finite abelian groups and cyclic groups
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asked Showing the set $A+B$ is closed.
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answered a group of order $9$ is abelian
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answered Combinatorial proofs - how?