- #1
lineintegral1
- 77
- 1
Hey all,
We have not covered quotient vector spaces in class, but my homework (due before next lecture) covers a few proofs regarding quotient spaces. I've done some reading on them and some of their aspects, but as it is still a new concept, I am struggling with how to go about this proof.
Let [itex]M,N\subset L[/itex] where [itex]L[/itex] is a vector space and [itex]M,N[/itex] are linear subspaces of [itex]L[/itex]. Prove that the following mapping is a linear isomorphism:
[tex](M+N)/N \rightarrow M/M \cap N[/tex]2. The attempt at a solution
Well, I understand that the general approach to proving this would be to show that the morphism is bijective. Thus, I want to show that whatever is in the codomain is in the domain such that it gets mapped to the codomain. I also want to show that uniqueness in the codomain implies uniqueness in the domain. Can someone give me some tips as to how to work with quotient spaces such that I can relate these to more elementary linear algebra problems?
Hope that all makes sense. Thanks!
We have not covered quotient vector spaces in class, but my homework (due before next lecture) covers a few proofs regarding quotient spaces. I've done some reading on them and some of their aspects, but as it is still a new concept, I am struggling with how to go about this proof.
Homework Statement
Let [itex]M,N\subset L[/itex] where [itex]L[/itex] is a vector space and [itex]M,N[/itex] are linear subspaces of [itex]L[/itex]. Prove that the following mapping is a linear isomorphism:
[tex](M+N)/N \rightarrow M/M \cap N[/tex]2. The attempt at a solution
Well, I understand that the general approach to proving this would be to show that the morphism is bijective. Thus, I want to show that whatever is in the codomain is in the domain such that it gets mapped to the codomain. I also want to show that uniqueness in the codomain implies uniqueness in the domain. Can someone give me some tips as to how to work with quotient spaces such that I can relate these to more elementary linear algebra problems?
Hope that all makes sense. Thanks!