+A Banach space is a [Normed Space](/wiki/normed_space) where every Cauchy sequence finds its limit within the space, making it 'complete'. This completeness underpins much of [Functional Analysis](/wiki/functional_analysis), offering a sturdy foundation for infinite-dimensional mathematics.
+## See also
+- [Metric Space](/wiki/metric_space)
+- [Hilbert Space](/wiki/hilbert_space)
+- [Vector Space](/wiki/vector_space)
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