+A Hilbert space is a generalization of [Euclidean space](/wiki/euclidean_space), extending the familiar concepts of distance and angle to potentially infinite dimensions. It is a [vector space](/wiki/vector_space) endowed with an inner product, forming a complete metric space crucial for the mathematical foundations of quantum mechanics.
+## See also
+- [Quantum Mechanics](/wiki/quantum_mechanics)
+- [Functional Analysis](/wiki/functional_analysis)
+- [Linear Algebra](/wiki/linear_algebra)
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