Abstract :
Several new data structures for dictionaries are presented that use just one location in addition to those required for key values. The structures are generalizations of a rotated sorted list, with the best realizing a search time of 0(log n) and insert and delete times of 0(n√2/log n(log n)3/2). Similar structures are presented for a dictionary with records containing k≫1 keys, under the operations of search, partial match, insert and delete.
