EntityQ1626416· pop 16· linked from 263 articleshomotopy groupSign in to savealgebraic construct classifying topological spacesConnectionshomotopyEntityconnected spaceEntityhomologyEntityorientabilityEntityexotic sphereEntityfibrationEntitymathematicsEntityInternational Standard Book NumberEntitytopologyEntitysphereEntitydigital object identifierEntitygroupEntitygroup theoryEntitytorusEntitycontinuous functionEntityJSTOROrganizationmetric spaceEntitytopological spaceEntityQ118398EntitybijectionEntityCategoriesHomotopy theory