EntityQ1099545· pop 6· linked from 20 articlesJanko groupSign in to saveone of four sporadic groups discovered or conjectured by Z. JankoConnectionsLie groupEntitytopological groupEntityorthogonal groupEntityMathieu groupEntitysporadic groupEntityintegerEntityBerlin WallEntityWayback MachineEntitygroup theoryEntityabelian groupEntityalgebraic structureEntityimageEntitysubgroupEntityelliptic curveEntityJohannes Gutenberg University MainzEntitygroup homomorphismEntityLagrange's theoremEntitycyclic groupEntitynormal subgroupEntityquotient groupEntityCategoriesSporadic groups