Find:2 Non-isomorphic groups of order n squared. help?

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In summary, two non-isomorphic groups of order n squared are Z_n x Z_n and Z_(n^2). These groups are not isomorphic to each other and can be seen as cyclic and non-cyclic in terms of vector spaces.
  • #1
assman
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Find:2 Non-isomorphic groups of order n squared

i think that Zn X Zn is one.

Can you help me find another.


Thanks
 
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  • #2
Isomorphic to what?
 
  • #3
nonisomorphic means not isomorphic to each other, doesn't it? like the klein 4-group & Z_4 both have order 2^2 but are nonisomorphic

since K_4 = Z_2 x Z_2 i conjecture off the cuff that the 2 nonisomorphic groups with order n^2 would be Z_n x Z_n and Z_(n^2)
 
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  • #4
If you mean non-isomorphic to each other, then you can take Z_(n^2) and Z_n x Z_n, for example (under addition).

In response to the above post: Indeed, those work, since Z_(n^2) is cyclic but Z_n x Z_n is not (you can see this alternatively in terms of vector spaces: dim(Z_(n^2)) = 1 but dim(Z_n x Z_n) = 2)
 
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1. What is the definition of "non-isomorphic groups"?

Non-isomorphic groups are two groups that are not structurally identical, meaning they cannot be mapped onto each other in a way that preserves the group operation. In other words, they have different group structures, even though they may have the same number of elements.

2. How do you find non-isomorphic groups of order n squared?

To find non-isomorphic groups of order n squared, you can use the direct product construction. This involves taking two groups of order n and multiplying them together to form a new group of order n squared. By varying the groups used in the direct product, you can obtain different non-isomorphic groups of order n squared.

3. What is the significance of finding non-isomorphic groups?

Finding non-isomorphic groups is important in the study of abstract algebra as it helps us understand the different ways in which groups can be structured. It also allows us to classify and categorize groups based on their structures.

4. Can you give an example of two non-isomorphic groups of order n squared?

One example of two non-isomorphic groups of order n squared would be the cyclic group of order n, denoted as Cn, and the Klein four-group, denoted as V. The direct product of Cn and V results in a non-isomorphic group of order n squared.

5. Are there any other methods for finding non-isomorphic groups?

Yes, there are other methods for finding non-isomorphic groups such as using Cayley graphs, examining the group's multiplication table, and using the concept of group isomorphism to show that two groups are not isomorphic.

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