find......prove
(10-07-2016)
s= phi= empty set
(10-07-2016), (10-07-2016)
( ) ....
provefind
( ) .... = =
= 1 / 8 / 4
; 10-08-2016 12:09 AM
(8) (6).............(2016)
: 1 (0 1 )
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