How do I prove that $r(3,t+1) ≥ 3t$
104903
Lower bound for Ramsey numbers: $R( n + 2 , 3 )>3n$
131754
Prove $ \forall c \in \mathbb{R^{+}}, \forall B \in \mathbb{N}, \exists n \in \mathbb{N}, (n \geq B) \wedge (\sqrt{2n} > c \ln(n+2)) $?
20863
how do I prove this inequallity?
143765
To Show that $\exp(tX)\exp(tY)= \exp(t(X+Y)) + (1/2)t^2[X, Y] +o(t^3)$
52204
Proof of one inequality $a+b+c\leq\frac{a^3}{bc}+\frac{b^3}{ca}+\frac{c^3}{ab}$
77134
Proving a three variables inequality
149907
$T\circ T=0:V\rightarrow V \implies R(T) \subset N(T)$
65395
Prove that if $\operatorname{rank}(T) = \operatorname{rank}(T^2)$ then $R(T) \cap N(T) = \{0\}$
101861
How do you prove that $tr(B^{T} A )$ is a inner product?
108995
Prove $|e^{i\theta} -1| \leq |\theta|$
122944
Prove $|y''(x)| \leq 40$ for all $x \in [1,3]$.
66082
Using $\sqrt{1-t}\leq 1-\frac t2$ to show that $\frac{1\cdot3\cdot5\cdots(2n-1)}{2\cdot4\cdot6\cdots2n}\geq\frac1{2\sqrt n}$
39015
Prove the triangle inequality on the sphere $S^2$ in $\mathbb{R}^3$.
100375
Prove that ${\sqrt {n} }^{\sqrt {n+1}} > {\sqrt {n+1}}^{\sqrt {n}}$.
155884
What are the conditions on $\text{tr}(AB) \leq \text{tr(A)} \text{tr(B)}$ to be true?
36980
Prove the third isomorphism theorem
73938
Prove that $\sum_{r=1}^nr(r+1)=\frac{n(n+1)(n+2)}{3}$ using induction