- Functional dyspepsia - Symptoms and causes - Mayo Clinic
Functional dyspepsia is a term used to describe a lingering upset stomach that has no obvious cause Functional dyspepsia (dis-PEP-see-uh) also is called nonulcer dyspepsia Functional dyspepsia is common It is a constant condition, but symptoms don't happen all the time Symptoms are like those of an ulcer
- Good book for self study of functional analysis
Functional analysis is, for a large part, linear algebra on a infinite dimensional vector space over the real or complex numbers Having a good intuition from linear algebra is essential: you'll know what is reasonable to expect when the dimensional infinities can be controlled (by some sort of compactness), and when they cannot be controlled
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