Proof of ⊨∃x(Px⇒∀xPx) (Drinker's Paradox)
1027
Why is this true? $(\exists x)(P(x) \Rightarrow (\forall y) P(y))$
53899
Proof of the Sherman-Morrison Formula
125668
A proof that BS(1,2) is not polycyclic
99435
Proof of the inclusion-exclusion formula in probability
58481
Exclusion Inclusion Principle Induction Proof
124936
Help with a Probability Proof
151561
Proving 'Law of Excluded Middle' in Fitch system
60208
Proof of property of abelian group
64586
How to prove that $\neg((A\cap B)\cup (\neg A \cap C)) = (A\cap\neg B)\cup (\neg A\cap \neg C)$
80362
Simpler proof - Non atomic measures
30770
Prove that $C\left(\bigcup_{\alpha\in I} A_\alpha\right)=\bigcap_{\alpha\in I}C\left(A_\alpha\right)$
2251
Can someone give me a hint on how to prove this?
91281
Proving the so-called "Well Ordering Principle"
126633
Is a contradiction enough to prove a set equality to $\varnothing$?
21097
If $A$ and $B$ are independent events, and $A$ and $C$ are independent events, how do I show that $A$ and $B\cup C$ are independent?
116305
Proving DeMorgan's Theorem
41832
Continued fractions paradox