savitch - . NPSPACE = PSPACE : Savitch htyn ly ihxt dxwn ....

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Unformatted text preview: . NPSPACE = PSPACE : Savitch htyn ly ihxt dxwn . PSPACE ⊆ NPSPACE :oey`x oeeik zlra c"` dpekna eze` rval xyt`y i`ceea f` 'xhc dpekna aeyigd z` rval xyt` m` - il`ieeixh .oexkif zyixc dze` . NPSPACE ⊆ PSPACE :ipy oeeik zynzyn `id , n jxe`a x hlw lkle L ( M ) = L y jk M c"` h"n dl zniiw if` . L ∈ NPSPACE idz . p mepilet xear oexkif i`z p ( n ) a xzeid lkl .mepilet df mb - O ( p 2 ( n ) ) oexkifa zynzyn xy` L dtyd xear M 'xhc h"n d`xp : x lr M ly zeivxebitpewd sxb .hxqd okez z`e miy`xd mewin z` , M ly dxwad avn z` millek - zeivxebitpew md sxbd iznv . B = 2 O ( p ( n )) :zeivxebitpewd xtqnk xzeid lkl `ed sxba miznvd xtqn-pewdn cg` crva xearl ozip , w lr M ly aeyiga m` sxba zpeekn zyw `id ( c 1 ,c 2 ) :zezyw dnkl xearl ozip c 1 znevdny zeidl leki ,c"` `id M y oeeikn) . c 2 divxebitpewd l` c 1 divxebit .(dcigi zg`l wx `le zexg` zeivxebitpew lr c 2 z`e cg` hxq lr c 1 z` minyex : O ( p ( n )) oexkifa zeprl ozip ( c 1 ,c 2 ) ∈ E m`d dl`yd lr ote`l dni`zn drepzdye ,y`xd cil `vnpd cg` mewnl hxt ddf mihxqd okezy miwcea .ipy hxqote`l dni`zn drepzdye ,y`xd cil `vnpd cg` mewnl hxt ddf mihxqd okezy miwcea ....
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