I am an undergraduate engineering physics student since 1 1/2 years back. I've taken classes in real analysis, complex analysis and linear algebra.
When one tries to read about math on Wikipedia the articles talk about mathematical structures, mathematical objects and so on. I'd like to know more about this, which to me seems like the foundation for everything math?
I want to know if there are any appropriate books, given my background, that would be possible to use for self-study?