Two function algebras defining functions in NCk boolean circuits
We describe the functions computed by boolean circuits in NCk by means of functions algebra for k≥1 in the spirit of implicit computational complexity. The whole hierarchy defines NC. In other words, we give a recursion-theoretic characterization of the complexity classes NCk for k≥1 without referen...
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| Vydané v: | Information and computation Ročník 248; s. 82 - 103 |
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| Hlavní autori: | , , , |
| Médium: | Journal Article |
| Jazyk: | English |
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Elsevier Inc
01.06.2016
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| ISSN: | 0890-5401, 1090-2651 |
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| Abstract | We describe the functions computed by boolean circuits in NCk by means of functions algebra for k≥1 in the spirit of implicit computational complexity. The whole hierarchy defines NC. In other words, we give a recursion-theoretic characterization of the complexity classes NCk for k≥1 without reference to a machine model, nor explicit bounds in the recursion schema. Actually, we give two equivalent descriptions of the classes NCk, k≥1. One is based on a tree structure à la Leivant, the other is based on words. This latter puts into light the role of computation of pointers in circuit complexity. We show that transducers are a key concept for pointer evaluation. |
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| AbstractList | We describe the functions computed by boolean circuits in NCk by means of functions algebra for k≥1 in the spirit of implicit computational complexity. The whole hierarchy defines NC. In other words, we give a recursion-theoretic characterization of the complexity classes NCk for k≥1 without reference to a machine model, nor explicit bounds in the recursion schema. Actually, we give two equivalent descriptions of the classes NCk, k≥1. One is based on a tree structure à la Leivant, the other is based on words. This latter puts into light the role of computation of pointers in circuit complexity. We show that transducers are a key concept for pointer evaluation. |
| Author | Bonfante, Guillaume Marion, Jean-Yves Kahle, Reinhard Oitavem, Isabel |
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| Copyright | 2016 Elsevier Inc. |
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| DOI | 10.1016/j.ic.2015.12.009 |
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| References | Ruzzo (br0200) 1981; 22 Bellantoni, Cook (br0030) 1992; 2 Cobham (br0080) 1962 Immerman (br0130) 1998 Girard (br0110) 1998; 143 Balcázar, Díaz, Gabarró (br0010) 1990; vol. 22 Clote (br0070) 1990 Sakarovitch (br0210) 2009 Goldreich (br0120) 2008 Leivant (br0160) 1998 Edmonds (br0090) 1965; 17 Mogbil, Rahli (br0190) 2007; vol. 4514 Bonfante, Kahle, Marion, Oitavem (br0050) 2008; vol. 5213 Leivant, Marion (br0170) 2000; 236 Marion (br0180) 2009; 5 Bloch (br0040) 1994; 4 Leivant (br0150) 1993 Leivant (br0140) 1991 Bellantoni (br0020) 1995; vol. 960 Chandra, Kozen, Stockmeyer (br0060) 1981; 28 Elgot, Mezei (br0100) Jan. 1965; 9 Simmons (br0220) 1988; 27 |
| References_xml | – volume: 27 start-page: 177 year: 1988 end-page: 188 ident: br0220 article-title: The realm of primitive recursion publication-title: Arch. Math. Log. – volume: 2 start-page: 97 year: 1992 end-page: 110 ident: br0030 article-title: A new recursion-theoretic characterization of the poly-time functions publication-title: Comput. Complex. – year: 1991 ident: br0140 article-title: A foundational delineation of computational feasibility publication-title: Proceedings of the Sixth IEEE Symposium on Logic in Computer Science – start-page: 716 year: 1998 end-page: 724 ident: br0160 article-title: A characterization of NC by tree recurrence publication-title: Foundations of Computer Science 1998 – volume: vol. 22 year: 1990 ident: br0010 article-title: Structural Complexity II publication-title: EATCS Monographs of Theoretical Computer Science – volume: vol. 960 start-page: 253 year: 1995 end-page: 268 ident: br0020 article-title: Characterizing parallel time by type 2 recursions with polynomial output length publication-title: Logic and Computational Complexity – volume: 9 start-page: 47 year: Jan. 1965 end-page: 68 ident: br0100 article-title: On relations defined by generalized finite automata publication-title: IBM J. Res. Dev. – year: 2008 ident: br0120 article-title: Computational Complexity: A Conceptual Perspective – volume: 4 start-page: 175 year: 1994 end-page: 205 ident: br0040 article-title: Function-algebraic characterizations of log and polylog parallel time publication-title: Comput. Complex. – volume: 22 start-page: 365 year: 1981 end-page: 383 ident: br0200 article-title: On uniform circuit complexity publication-title: J. Comput. Syst. Sci. – year: 2009 ident: br0210 article-title: Elements of Automata Theory – volume: vol. 4514 start-page: 401 year: 2007 end-page: 421 ident: br0190 article-title: Uniform circuits, & boolean proof nets publication-title: LFCS – start-page: 49 year: 1990 end-page: 69 ident: br0070 article-title: Sequential, machine independent characterizations of the parallel complexity classes publication-title: Feasible Mathematics – start-page: 24 year: 1962 end-page: 30 ident: br0080 article-title: The intrinsic computational difficulty of functions publication-title: Proceedings of the International Conference on Logic, Methodology, and Philosophy of Science – volume: 143 start-page: 175 year: 1998 end-page: 204 ident: br0110 article-title: Light linear logic publication-title: Inf. Comput. – volume: 236 start-page: 192 year: 2000 end-page: 208 ident: br0170 article-title: A characterization of alternating log time by ramified recurrence publication-title: Theor. Comput. Sci. – volume: 28 start-page: 114 year: 1981 end-page: 133 ident: br0060 article-title: Alternation publication-title: J. ACM – year: 1993 ident: br0150 article-title: Stratified functional programs and computational complexity publication-title: Twentieth Annual ACM Symposium on Principles of Programming Languages – volume: vol. 5213 year: 2008 ident: br0050 article-title: Recursion schemata for publication-title: CSL '08 – year: 1998 ident: br0130 article-title: Descriptive Complexity – volume: 17 start-page: 449 year: 1965 end-page: 467 ident: br0090 article-title: Paths, trees, and flowers publication-title: Can. J. Math. – volume: 5 year: 2009 ident: br0180 article-title: On tiered small jump operators publication-title: Log. Methods Comput. Sci. |
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| SubjectTerms | Boolean circuits formula omitted Parallel computation class Transducers |
| Title | Two function algebras defining functions in NCk boolean circuits |
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