How to apply Zorn's Lemma on open intervals
29668
Why doesn't Zorn's lemma apply to $[0,1)$?
94363
Prove: Any open interval has the same cardinality of $\Bbb R$ (without using trigonometric functions)
15380
Notation for intervals
3870
A variation of Borel Cantelli Lemma
132431
Proving $|f'(z)|\leq\frac{\text{Re}(f(z))}{\text{Re}(z)}$
69337
Zorn's Lemma And Axiom of Choice
154759
Kuratowski-Zorn Lemma with pre-order (quasi-order, proset) instead poset?
77210
Zorn's Lemma and Posets
66239
Verifying that a certain collection of intervals of $\mathbb R$ forms a topology
99464
Proof Concerning Indexed family of Sets and Intervals
125233
Why is an open interval not a compact set?
43350
Schwarz's Lemma exercise
132223
Function whose image of every open interval is $(-\infty,\infty)$
86537
Prove that an open interval and a closed interval are not homeomorphic
157731
Show that one-sided limits always exist for a monotone function (on an interval)
39921
show that f is constant on I
63277
Gordan’s lemma equivalent statement