How many different non-isomorphic Abelian groups of order 4 are there?
- 2
- 3
- 4
this is already discussed here https://gateoverflow.in/1219/gate2007-21
doubt 1 - here how do we ensure that the splits formed are abelian groups ?
doubt 2 - if order of the group can be prime factorised then its sure to be abelian ?
doubt 3 - how is non isomorphism proved in the solution?