My interests in CS are fairly narrow; I'm mainly interested in numerical analysis and numerical methods for solving differential equations. However, during my undergrad I mainly focused on other, more traditional aspects of CS. I don't have as strong a preparation in the applied math side required for a PhD in Applied Math/Numerical Analysis. A class I took my senior year (second semester!) got me really interested in numerics and I've spent much of my free time since then self-studying the material.
Are there any good CS programs where I can get a good background in applied math/numerical analysis and largely avoid topics like graph theory and combinatorics? With my (relatively) weak preparation in formal math, I think a good math masters is not in the cards.