complexity theory的问题,懂的进来两道证明题:(1)A complexity class C is closed under polynomial time reductions if,whenever A ≤pB and B ∈C,then A ∈C.Show that RP,BPP and PP are closed under polynomial time reductions.(2)Show that PP

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complexitytheory的问题,懂的进来两道证明题:(1)AcomplexityclassCisclosedunderpolynomialtimereductionsif,wheneverA≤

complexity theory的问题,懂的进来两道证明题:(1)A complexity class C is closed under polynomial time reductions if,whenever A ≤pB and B ∈C,then A ∈C.Show that RP,BPP and PP are closed under polynomial time reductions.(2)Show that PP
complexity theory的问题,懂的进来
两道证明题:
(1)A complexity class C is closed under polynomial time reductions if,whenever A ≤pB and B ∈C,
then A ∈C.Show that RP,BPP and PP are closed under polynomial time reductions.
(2)Show that PP is closed under complementation.That is,if A ∈PP,then A ∈ PP.
最后一个A应该是A拔,A上面那一横画不出来。

complexity theory的问题,懂的进来两道证明题:(1)A complexity class C is closed under polynomial time reductions if,whenever A ≤pB and B ∈C,then A ∈C.Show that RP,BPP and PP are closed under polynomial time reductions.(2)Show that PP
(1) RP的问题.
用反证法,假设有一个a< L,a 1/2,取反就是把

晕,一看英文就头疼,您还是自己做吧

1.如果一个复杂性集类C是封闭于多项式归约,那么若B∈C,且对任意A∈C,有A≤pB,
证明:RP, BPP 和PP都封闭于多项式归约
2.证明PP是封闭且互补的,
即如A ∈PP,则A(拔)∈PP。
证明不会,我只在算法设计中学了一点复杂性理论。

fanyi!

翻译有没加分?

1 parameters missed or illegal, access aborted

1.用反证法。
2.直接用定义证明。
写出定义整理便可证明。

建议你不要把这种问题放在这个位置,应放在“外语/出国”

翻译过来

if A ∈PP, then A ∈ PP
这个证明不错

看不懂

建议你不要把这种问题放在这个位置,应放在“外语/出国”!!!!!!!!!!!!

英文!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

( 1 )复杂性为丙类下封闭多项式时间减少,如果,哪怕是一个≤铅和B ∈ c ,
然后∈长显示反相, bpp和PP是封闭下多项式时间减少。
( 2 )表明,聚丙烯下封闭互补。这就是,如果一个∈聚丙烯,然后∈页。
我没学过数学,这是直接翻译...

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( 1 )复杂性为丙类下封闭多项式时间减少,如果,哪怕是一个≤铅和B ∈ c ,
然后∈长显示反相, bpp和PP是封闭下多项式时间减少。
( 2 )表明,聚丙烯下封闭互补。这就是,如果一个∈聚丙烯,然后∈页。
我没学过数学,这是直接翻译

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