[1]GAO Qiang,XU Xinhe.Research on time complexity and space complexity[J].CAAI Transactions on Intelligent Systems,2014,9(5):529-535.[doi:10.3969/j.issn.1673-4785.201311055]
Copy
CAAI Transactions on Intelligent Systems[ISSN 1673-4785/CN 23-1538/TP] Volume:
9
Number of periods:
2014 5
Page number:
529-535
Column:
综述
Public date:
2014-10-25
- Title:
-
Research on time complexity and space complexity
- Author(s):
-
GAO Qiang; XU Xinhe
-
College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
-
- Keywords:
-
computational complexity; Turing machine; P; NP; NP-complete; PSAPCE; PSAPCE-complete; reducibility
- CLC:
-
TP301.5
- DOI:
-
10.3969/j.issn.1673-4785.201311055
- Abstract:
-
Computational complexity is used to measure the level of difficulty of a problem being solved. The research on computational complexity of the problem can make it explicit. This paper introduces and analyzes some fundamental concepts of the computation theory and discusses some main classes of time complexity (including P, NP, NP-hard, NP-complete and EXPTIME) and space complexity (including PSPACE, NPSPACE, PSPACE-hard and PSAPCE-complete) by examples. Finally the relations among complexity classes are analyzed.