| unDB | Control.Monad.Search.Combinatorial |
| unDBM | Control.Monad.Search.Combinatorial |
| unifyable | MagicHaskeller, MagicHaskeller.RunAnalytical, MagicHaskeller.LibTH |
| unifyableF | MagicHaskeller, MagicHaskeller.RunAnalytical, MagicHaskeller.LibTH |
| unionWithBy | MagicHaskeller.Classification |
| uniqSort | MagicHaskeller.Expression |
| uniqSorter | MagicHaskeller.Expression |
| unL | MagicHaskeller.ExecuteAPI610, MagicHaskeller.RunAnalytical |
| unMx | Control.Monad.Search.Combinatorial |
| unRc | Control.Monad.Search.Combinatorial |
| unRcT | Control.Monad.Search.Combinatorial |
| Unsafe | MagicHaskeller, MagicHaskeller.RunAnalytical, MagicHaskeller.LibTH |
| unsafe | MagicHaskeller, MagicHaskeller.RunAnalytical, MagicHaskeller.LibTH |
| unsafeCoerce# | MagicHaskeller, MagicHaskeller.RunAnalytical, MagicHaskeller.LibTH |
| unsafeExecuteAPI | MagicHaskeller.ExecuteAPI610, MagicHaskeller.RunAnalytical |
| unsafeFilt | MagicHaskeller.Classification |
| unsafeFiltFun | MagicHaskeller.Classification |
| unsafeRandomTestFilter | MagicHaskeller.Classification |
| unscanlByList | MagicHaskeller.Classification |
| unsetTimeout | MagicHaskeller, MagicHaskeller.RunAnalytical, MagicHaskeller.LibTH |
| unwrapCore | MagicHaskeller.ExecuteAPI610, MagicHaskeller.RunAnalytical |
| unwrapCore' | MagicHaskeller.ExecuteAPI610, MagicHaskeller.RunAnalytical |
| unwrapLStmt | MagicHaskeller.ExecuteAPI610, MagicHaskeller.RunAnalytical |