The modern technical definition of a functional is a function from a vector space into the scalar field. For example, finding the length of a vector is a (non-linear) functional, or taking a vector and returning the 3rd coordinate (relative to some basis) is a (linear) functional. But in a classical sense, functional is an antiquated term for a function that takes a function as input. For ...
Overview 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. They include pain or discomfort in the upper belly, bloating, belching and ...
Treatment Functional dyspepsia that can't be managed with lifestyle changes may need treatment. Treatment depends on symptoms. It may combine medicines and behavior therapy. Medicines Some medicines may help manage symptoms of functional dyspepsia. They include: Gas remedies that are available without a prescription.
Functional neurologic disorder — a newer and broader term that includes what some people call conversion disorder — features nervous system (neurological) symptoms that can't be explained by a neurological disease or other medical condition. However, the symptoms are real and cause significant ...
I am looking for excellent VIDEO lectures on functional analysis. They should be (1) in English (2) the video quality and voice is good (3) the lecture should not be presented in boring style I a...
In the context of functional analysis, a functional is a function from a vector space to its base field (usually $\mathbb {R}$ or $\mathbb {C}$). In many important cases they are linear, but this is not always the case. In the context of normed vector spaces or more generally topological vector spaces, they are also often continuous, but again this is not always the case. Much less commonly ...