16Uxx Conditions on elements (including elements of matrix rings, etc.)

• 16U10 Integral domains
• 16U20 Ore rings, multiplicative sets, Ore localization
• 16U30 Divisibility, noncommutative UFDs
• 16U50 Algebraicity and local finiteness, See also {16N40}
• 16U60 Units, groups of units, general linear groups
• 16U70 Center, normalizer (invariant elements)
• 16U80 Generalizations of commutativity
• 16U99 None of the above but in this section