A Note on Non-complete Problems in NPImage
نویسندگان
چکیده
This note deals with the structure of the class NPR introduced by L. Blum, M. Shub, and S. Smale (1989, Bull. Amer. Math. Soc. 21, 1 46). It is shown that, assuming NPR 3 PR poly, there exists a problem NPR"(PR poly) which is not NPR-complete (w.r.t PR poly reductions). It also clarifies the scope of a padding technique used in a former similar result by R. Ladner (1975, J. Assoc. Comput. Mach. 22, 155 171) concerning the structure of the class NP (in the common, Turing machine, model). 2000 Academic Press
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عنوان ژورنال:
- J. Complexity
دوره 16 شماره
صفحات -
تاریخ انتشار 2000