| MinimaTSource, TKey(IEnumerableTSource, FuncTSource, TKey) | Returns the minimal elements of the given sequence, based on the given projection. | 
| MinimaTSource, TKey(IEnumerableTSource, FuncTSource, TKey, IComparerTKey) | Returns the minimal elements of the given sequence, based on the given projection and the specified comparer for projected values. |