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This tag is for questions relating to Hilbert Space, a vector space equipped with an inner product, an operation that allows defining lengths and angles, and the space is complete. It arises naturally and frequently in mathematics and physics, typically as infinite-dimensional function spaces having the property that it is complete. Applies also to pre-Hilbert spaces, rigged Hilbert spaces, and spaces with negative norm or zero-norm states.

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Do infinite dimensional systems make sense? [closed]

I'm learning infinite-dimensional systems in mathematical viewpoint and trying to understand it from physical perspective. I would like to understand if infinite-dimensional systems make sense in ph …
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