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## abstract algebra

Linear Algebra, Algebraic structures (Groups, Rings, Modules, etc), Galois theory, Homological Algebra
Asis ghosh
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Joined: Mon Feb 05, 2018 4:22 am

### abstract algebra

Construct a group $G$ such that $G$ has a normal subgroup $N$ and $N$ has a normal subgroup $M$ (i.e. $N\vartriangleleft{G}\,,\; M\vartriangleleft{N}$), yet $M$ is not normal in $G$.
Last edited by admin on Sun Feb 11, 2018 2:51 pm, edited 1 time in total.
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