EntityQ306560· pop 5· linked from 19 articlesmapping coneSign in to savetopological constructionConnectionsmathematicsEntityInternational Standard Book NumberEntitycircleEntityfunctionEntitytopologyEntitysphereEntitycontinuous functionEntitydiskEntityisomorphismEntitytopological spaceEntityequivalence relationEntityCambridge University PressEntityhomeomorphismEntityidentity elementEntityhomotopyEntityfundamental groupEntityhomologyEntityboundaryEntityequivalence classEntityunit intervalEntityCategoriesAlgebraic topology