20F10 Word problems, other decision problems, connections with logic and automata [See also <a href="#code:03B25">03B25</a>, <a href="#code:03D05">03D05</a>, <a href="#code:03D40">03D40</a>, <a href="#code:06B25">06B25</a>, <a href="#code:08A50">08A50</a>, <a href="#code:20M05">20M05</a>, <a href="#code:68Q70">68Q70</a>]

20F11 Groups of finite Morley rank [See also <a href="#code:03C45">03C45</a>, <a href="#code:03C60">03C60</a>]

20F14 Derived series, central series, and generalizations

20F16 Solvable groups, supersolvable groups [See also <a href="#code:20D10">20D10</a>]

20F17 Formations of groups, Fitting classes [See also <a href="#code:20D10">20D10</a>]

20F18 Nilpotent groups [See also <a href="#code:20D15">20D15</a>]

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 <a href="#code:20E36">20E36</a>]

20F29 Representations of groups as automorphism groups of algebraic systems

20F34 Fundamental groups and their automorphisms [See also <a href="#code:57M05">57M05</a>, <a href="#code:57Sxx">57Sxx</a>]

20F38 Other groups related to topology or analysis

20F50 Periodic groups; locally finite groups

20F55 Reflection and Coxeter groups [See also <a href="#code:22E40">22E40</a>, <a href="#code:51F15">51F15</a>]

20F60 Ordered groups [See mainly <a href="#code:06F15">06F15</a>]

20F65 Geometric group theory [See also <a href="#code:05C25">05C25</a>, <a href="#code:20E08">20E08</a>, <a href="#code:57Mxx">57Mxx</a>]

20F67 Hyperbolic groups and nonpositively curved groups

20F70 Algebraic geometry over groups; equations over groups

20F99 None of the above, but in this section

20Gxx Linear algebraic groups and related topics {For arithmetic theory, see <a href="#code:11E57">11E57</a>, <a href="#code:11H56">11H56</a>; for geometric theory, see <a href="#code:14Lxx">14Lxx</a>, <a href="#code:22Exx">22Exx</a>; for other methods in representation theory, see <a href="#code:15A30">15A30</a>, <a href="#code:22E45">22E45</a>, <a href="#code:22E46">22E46</a>, <a href="#code:22E47">22E47</a>, <a href="#code:22E50">22E50</a>, <a href="#code:22E55">22E55</a>}