Functional analysis

L-semi-inner product

In mathematics, there are two different notions of semi-inner-product. The first, and more common, is that of an inner product which is not required to be strictly positive. This article will deal with the second, called a L-semi-inner product or semi-inner product in the sense of Lumer, which is an inner product not required to be conjugate symmetric. It was formulated by Günter Lumer, for the purpose of extending Hilbert space type arguments to Banach spaces in functional analysis. Fundamental properties were later explored by Giles. (Wikipedia).

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Related pages

Additive map | Norm (mathematics) | Linear map | Definite quadratic form | Hilbert space | Functional analysis | Günter Lumer | Mathematics | Measure space | Normed vector space | Euclidean space