TIGHTER LOWER BOUNDS ON THE EXACT COMPLEXITY OF STRING-MATCHING
UNSPECIFIED. (1995) TIGHTER LOWER BOUNDS ON THE EXACT COMPLEXITY OF STRING-MATCHING. SIAM JOURNAL ON COMPUTING, 24 (1). pp. 30-45. ISSN 0097-5397Full text not available from this repository.
This paper considers the exact number of character comparisons needed to find all occurrences of a pattern of length m in a text of length n using on-line and general algorithms. For on-line algorithms, a lower bound of about (1+9/4(m+1)).n character comparisons is obtained. For general algorithms, a lower bound of about (1+2/m+3).n character comparisons is obtained. These lower bounds complement an on-line upper bound of about (1+8/3(m+1)).n comparisons obtained recently by Cole and Hariharan. The lower bounds are obtained by finding patterns with interesting combinatorial properties. It is also shown that for some patterns off-line algorithms can be more efficient than on-line algorithms.
|Item Type:||Journal Article|
|Subjects:||Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software
Q Science > QA Mathematics
|Journal or Publication Title:||SIAM JOURNAL ON COMPUTING|
|Official Date:||February 1995|
|Number of Pages:||16|
|Page Range:||pp. 30-45|
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