Source: wikibot/semi-hilbert-space
= Semi-Hilbert space
{wiki=Semi-Hilbert_space}
A semi-Hilbert space is a generalization of the concept of a Hilbert space, which is a complete inner product space. While a Hilbert space has a complete inner product structure, a semi-Hilbert space maintains some of the properties of a Hilbert space but may not be complete. In a semi-Hilbert space, one can still define an inner product, which allows for the measurement of angles and distances.