20Fxx Special aspects of infinite or finite groups

20F05  Generators, relations, and presentations
20F06  Cancellation theory; application of van Kampen diagrams,
               See also {57M05}
20F10  Word problems, other decision problems, connections with
               logic and automata, See also {03B25, 03D05, 03D40,
               06B25, 08A50, 68Qxx}
20F12  Commutator calculus
20F14  Derived series, central series, and generalizations
20F16  Solvable groups, supersolvable groups
20F17  Formations of groups, Fitting classes, See also {20D10}
20F18  Nilpotent groups
20F19  Generalizations of solvable and nilpotent groups
20F22  Other classes of groups defined by subgroup chains
20F24  FC-groups and their generalizations
20F28  Automorphism groups of groups, See also {20E36}
20F29  Representations of groups as automorphism groups of
               algebraic systems
20F32  Geometric group theory, See also {05C25, 20Exx, 20Gxx}
20F34  Fundamental groups and their automorphisms, See Also {
               57M05, 57Sxx, 22E40}
20F36  Braid groups; Artin groups
20F38  Other groups related to topology or analysis
20F40  Associated Lie structures
20F45  Engel conditions
20F50  Periodic groups; locally finite groups
20F55  Coxeter groups, See also {22E40}
20F60  Ordered groups See mainly{ 06F15}
20F99  None of the above but in this section