Generic Complexity of Undecidable Problems

Author(s):  
Alexei Myasnikov
Keyword(s):  
2020 ◽  
Vol 25 (4) ◽  
pp. 10-15
Author(s):  
Alexander Nikolaevich Rybalov

Generic-case approach to algorithmic problems was suggested by A. Miasnikov, I. Kapovich, P. Schupp and V. Shpilrain in 2003. This approach studies behavior of an algo-rithm on typical (almost all) inputs and ignores the rest of inputs. In this paper, we prove that the subset sum problems for the monoid of integer positive unimodular matrices of the second order, the special linear group of the second order, and the modular group are generically solvable in polynomial time.


2001 ◽  
Vol 53 (9) ◽  
pp. 1227-1236 ◽  
Author(s):  
Christopher F.C Jordens ◽  
Miles Little ◽  
Kim Paul ◽  
Emma-Jane Sayers

Author(s):  
Angela Roskop Erisman

The ability to recognize genres has been central to modern critical study of the Pentateuch since the work of Hermann Gunkel at the turn of the twentieth century. This essay surveys the legal, administrative, and literary genres used in the Pentateuch, offering a sense of its generic complexity. Genres are defined not as the fixed and stable forms used to classify texts, as understood by classic form-critical method, but as idealized cognitive models employed as tools for writing and interpreting texts, an understanding drawn from modern genre theory. Because genres are situated in social contexts, Gunkel saw genre as central to writing a history of Israel’s literature. This essay surveys the limitations of Gunkel’s vision yet identifies a way to reconnect with it and write a more organic literary history, one that may intersect with but also at times challenge the results of source- and redaction-critical methods.


2015 ◽  
Vol 7 (2) ◽  
Author(s):  
Alexander Rybalov

AbstractA generic-case approach to algorithmic problems was suggested by Myasnikov, Kapovich, Schupp and Shpilrain in 2003. This approach studies the behavior of an algorithm on typical inputs and ignores the rest of the inputs. In this paper we consider generic complexity of the searching graph isomorphism problem. We fit this problem in the frameworks of generic complexity and prove that its natural subproblem is generically hard provided that the searching graph isomorphism problem is hard in the worst case.


2021 ◽  
Vol 1901 (1) ◽  
pp. 012047
Author(s):  
Alexander Rybalov ◽  
Artem Shevlyakov

1986 ◽  
Vol 20 (2) ◽  
pp. 95-114 ◽  
Author(s):  
Thomas F. Van Laan

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