solve the conversely theorem
Theorem: Let (X,τ) be topological space then if {x} is closed
set iff = {x}=∩{u |u is open set containing x}
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=)) if (x2 is closed set [x2 clulu is open set cun if цєлі и containing. is openset cuntaining! ; x+y =) tuet sit хей си-гу2) пру (+ф =) ходу) хру 2 [yl is not closed set this cl with ly? is closed ti x=y
1 [ulu is open set containing X {C{X} , open set =) {X { = [[u) u containing x } The conversely ??
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