If $A-B = B-A$ what can we conclude about A and B?
33542
When is $A- B = B- A$?
106305
Prove/disprove: if $\det(A+X) = \det(B + X)$ for all $X$, then $A=B$
158355
If $A$ commutes with $B$ and $B$ commutes with $C$, then $A$ commutes with $C$
62172
Why does $-b < a < b \iff |a| < b$?
113168
If $a > b$, is $a^2 > b^2$?
71717
Is this always true: $P(A|B) = 1-P(A^c|B)$?
21006
Let $a,b$ be positive integers such that $a\mid b^2 , b^2\mid a^3 , a^3\mid b^4 \ldots$ so on , then $a=b$?
20878
If $(a,b)=1$ then prove $(a+b, ab)=1$.
151852
How to prove $A \subset B \iff A \cup B = B$
75387
A proof that $1=2$. May I know why it’s false?
58113
Av = Bv for all v implies A = B?
5149
Show $\binom{a}{b}\binom{b}{c}=\binom{a}{a-c}\binom{a-c}{a-b}$
56399
Proof for $A \cup B = B$ if and only if $A \subset B$
101803
A\(B∩C) = (A\B) ∪ (A\C) how to prove?
51321
Prove that $A = B = C = D$
26766
Proving : $A \cap (B-C) = (A \cap B) - (A \cap C)$
38404
Prove $\gcd(a+b, a-b) = 1$ or $2\,$ if $\,\gcd(a,b) = 1$