Let and . If their composition is injective and is injective, I know that does not necessarily need to be injective. Could you please help me find an example of this? Thanks!
Let and . If their composition is injective and is injective, I know that does not necessarily need to be injective. Could you please help me find an example of this? Thanks!
as vector spaces over and define to be the natural projections and injections, i.e.