EntityQ3054915· pop 8· linked from 32 articlespointed setSign in to savea set equipped with a choice of a specific elementConnectionsinitial and terminal objectsEntityAlexandroff extensionEntitymathematicsEntityInternational Standard Book NumberEntityfunctionEntitytopologyEntitysetEntitydigital object identifierEntitygroupEntityvector spaceEntityempty setEntityOCLC, Inc.EntityCartesian productEntitycategory theoryEntityalgebraic structureEntityidentity elementEntityordered pairEntityhomomorphismEntitytheoretical computer scienceEntityLászló LovászEntityCategoriesAlgebraic structuresBasic concepts in set theoryCategory theory