One-Probe Search
One-Probe Search
复制标题
单探针搜索
DOI:
10.1007/3-540-45465-9_38
复制
发表时间:
2002
影响因子:
--
通讯作者:
R. Pagh
中科院分区:
文献类型:
--
作者:
Anna Pagh;R. Pagh
We consider dictionaries that perform lookups by probing a single word of memory, knowing only the size of the data structure. We describe a randomized dictionary where a lookup returns the correct answer with probability 1 - ?, and otherwise returns "don't know". The lookup procedure uses an expander graph to select the memory location to probe. Recent explicit expander constructions are shown to yield space usage far smaller than what would be required using a deterministic lookup procedure. Our data structure supports efficient deterministic updates, exhibiting newprobabilistic guarantees on dictionary running time.