Hacker News new | ask | show | jobs
by iamcreasy 2 days ago
Does anyone know any applied functional analysis book? I have strong linear algebra foundation, but no real analysis.
2 comments

I love this one

https://ia801706.us.archive.org/7/items/in.ernet.dli.2015.14...

Luenberger, Optimization By Vector Space Methods.

Although it is about a specific application, optimization, it is a good book to get a sense of infinite dimensional vector spaces. I would also recommend Halmos. His book surreptitiously introduces you to that subset of linear algebraic notions that survive inti infinite dimensional spaces.

if you take the spectral theorem, for example, there is a direct connection between linear algebra and functional analysis, basically it's linear algebra in infinite dimensions