Relativizations of Unambiguous and Random Polynomial Time Classes

1986 ◽  
Vol 15 (2) ◽  
pp. 511-519 ◽  
Author(s):  
John Geske ◽  
Joachim Grollmann
1994 ◽  
Vol 3 (1) ◽  
pp. 137-143 ◽  
Author(s):  
D. J. A. Welsh

It is shown that unless NP collapses to random polynomial time RP, there can be no fully polynomial randomised approximation scheme for the antiferromagnetic version of the Q-state Potts model.


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