Known-set-A-R-not-empty-If-Sup-A-Inf-A-then-set-A-is-

Question Number 55633 by gunawan last updated on 01/Mar/19

Known set A \subseteq R not empty,

If Sup A = Inf A, then set A is . .

Answered by arcana last updated on 18/Jun/19

definition

\forall x \in A, Inf A ⩽ x ⩽ Sup A

for hip . Inf A = Sup A = x

hence Inf A, Sup A \notin A \lor Inf A, Sup A \in A

You can't use 'macro parameter character #' in math mode

A is puntual

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