Compact group – Topological group with compact topology
Complete field – algebraic structure that is complete relative to a metricPages displaying wikidata descriptions as a fallback
Ellis–Numakura lemma – A compact topological semigroup with a semicontinuous product has an idempotent element
Locally compact group – topological group G for which the underlying topology is locally compact and Hausdorff, so that the Haar measure can be definedPages displaying wikidata descriptions as a fallback
Locally compact quantum group – relatively new C*-algebraic approach toward quantum groupsPages displaying wikidata descriptions as a fallback