51Fxx Metric geometry

• 51F05 Absolute planes
• 51F10 Absolute spaces
• 51F15 Reflection groups, reflection geometries, See also {20H10, 20H15; for Coxeter groups, See 20F55}
• 51F20 Congruence and orthogonality, See also {20H05}
• 51F25 Orthogonal and unitary groups, See also {20H05}
• 51F99 None of the above but in this section