Trying to prove (A ∩ B) - C = (A - C) ∩ (B - C)
70311
Trying to prove (A ∩ B) − C = (A − C) ∩ (B − C)
80759
Proving $A\times (B\cap C)=(A \times B)\cap (A\times C)$.
53660
Show that $ a，b，c, \sqrt{a}+ \sqrt{b}+\sqrt{c} \in\mathbb Q  \implies  \sqrt{a},\sqrt{b},\sqrt{c} \in\mathbb Q $
118981
Proving $\sqrt{ab} = \sqrt a\sqrt b$
101803
A\(B∩C) = (A\B) ∪ (A\C) how to prove?
70278
$A\subseteq B\to C\setminus B\subseteq C\setminus A\,$ -- how to prove this?
50296
Prove $(-a+b+c)(a-b+c)(a+b-c) \leq abc$, where $a, b$ and $c$ are positive real numbers
13136
Element chasing proof that $(A\setminus C)\setminus(B\setminus C) = (A\setminus B)\setminus C$
111003
Prove that if $A\triangle B = C\triangle B$, then $A = C$
114780
$\forall a,b,c \in \mathbb{N}\!:\ a\mid b \Rightarrow ac\mid bc. $ Divisibility Proof
26766
Proving : $A \cap (B-C) = (A \cap B) - (A \cap C)$
14162
How can I prove $\sup(A+B)=\sup A+\sup B$ if $A+B=\{a+b\mid a\in A, b\in B\}$
85688
How to show $\gcd(ac, bd) = \gcd(a,d) * \gcd(b,c)$
47059
How to establish this inequality: $(1-a)(1-b)(1-c) \geq 8abc$ for $a+b+c=1$?
153670
Prove that if $a \mid b$ and $b \mid c$, then $a \mid c$.
22856
Ways to go from A to B(proof)
2289
Prove that if $\gcd( a, b ) = 1$ then $\gcd( ac, b ) = \gcd( c, b ) $