20Dxx Abstract finite groups

• 20D05 Classification of simple and nonsolvable groups
• 20D06 Simple groups: alternating groups and groups of Lie type, See also {20Gxx, 22Exx}
• 20D08 Simple groups: sporadic groups
• 20D10 Solvable groups, theory of formations, Schunck classes, Fitting classes, $pi$-length, ranks, See also {20F17}
• 20D15 Nilpotent groups, $p$-groups
• 20D20 Sylow subgroups, Sylow properties, $pi$-groups, $pi$-structure
• 20D25 Special subgroups (Frattini, Fitting, etc.)
• 20D30 Series and lattices of subgroups
• 20D35 Subnormal subgroups
• 20D40 Products of subgroups
• 20D45 Automorphisms
• 20D50 Covering of subgroups
• 20D60 Arithmetic and combinatorial problems
• 20D99 None of the above but in this section