Set theory proof problem about bounds
33030
Proof that $\inf A = -\sup(-A)$
126015
Elementary number theory in sets
1307
Infimum and supremum of the empty set
79974
The cardinality of Lebesgue sets
82771
Proving that any polynomial $p:\mathbb{R}\rightarrow \mathbb{R}$ is not bounded, but its restriction to any bounded set is bounded
136789
How to prove $a \lt b$ for all $a \in A, b \in B$ implies $\sup A \leq \inf B$?
83518
Proving Two sets have same cardinality
88982
Prove that for any two sets $A$ and $B$, $A\notin B$ or $B\notin A$
153934
How to prove that a set R\Z is open
126633
Is a contradiction enough to prove a set equality to $\varnothing$?
77026
Proof with inequalities
103463
Mantel's Theorem proof verification
30330
How can I prove that this function is bounded using the given 2 hints?
105886
A question on the proof of 14 distinct sets can be formed by complementation and closure
24050
Characterization of the Closure of a Set
59813
Prove that for all sets A and B, A ∩ B = ∅ implies ( A ∪ B ) - B = A
25553
elementary set theory (cartesian product and symmetric difference proof)