regret criterionregret functionregroupingregualr tetrahedronregularegula duorum falsorumregula falsiregulaingregularregular banach spaceregular decagonregular dilatationregular elementregular element of lie algebraregular embeddingregular expressionregular figureregular functionregular graphregular heptagonregular hexagonregular hexagonal groupregular icosahedronregular idealregular languageregular linear mappingregular linear transformationregular matrixregular partregular pencentageregular pentagonregular permutationregular point of a surfaceregular point of an analytic setregular polygonregular polyhedral groupregular polyhedronregular presentationregular regionregular representationregular septagonregular sequenceregular setregular sets substitutionregular singularregular singular pointregular singularityregular solidregular solidsregular space
