EntityQ429593· pop 13· linked from 234 articlesBetti numberSign in to saveused to distinguish topological spaces based on the connectivity of n-dimensional simplicial complexesConnectionshomologyEntitycyclic groupEntitycharacteristicEntitysimplicial complexEntityCW complexEntityde Rham cohomologyEntityHodge theoryEntityMorse theoryEntityclosed manifoldEntityYouTubeConceptcomputer scienceEntityInternational Standard Book NumberEntityintegerEntityHenri PoincaréEntitytopologyEntitydigital object identifierEntitysoftware engineeringEntityEmmy NoetherEntityGustav KirchhoffEntitymathematical inductionEntityCategoriesAlgebraic topologyGenerating functionsGraph invariantsTopological graph theory