confidentialconfigurationconfineconfirmconfirmationconfluenceconfluentconfluent hypergeometric functionconfocalconfocal conic sectionsconfocal conicsconfocal ellipsesconfocal parabolasconfocal quadricsconformconformableconformalconformal connectionconformal geometryconformal mappingconformal representationconformal spaceconformal transformationconformally equivalent riemann surfacesconformanceconformityconfoundingconfusioncongestionconglomerate diversificationcongruencecongruence axiomcongruence classcongruence equationcongruence groupcongruence methodcongruence modulocongruence modulo mod ncongruence modulo ncongruence of linescongruence relationcongruencycongruentcongruent figurescongruent integerscongruent matricescongruent modulo mcongruent numberscongruent transformationsconhomology classes