Proving that $R^2$ is $r^2$
51189
The equivalence of sample correlation and R statistic for simple linear regression
12825
Bijection between $2^{\mathbb R}$ and $\mathbb{ R ^ R}$
73927
Is $\mathbb{R}$ a subset of $\mathbb{R}^2$?
95513
Proving $W$ is a subspace of $P_{2}$
50930
Proving the continued fraction representation of $\sqrt{2}$
158569
Proving a particular subset of $R^n$ is closed
96894
Prove $f_{n+1}^2+f_n^2=f_{2n+1}$
34768
Proving $(p \oplus q) \oplus r=p \oplus (q \oplus r)$
45811
How to prove that r is a double root if and only if it is a root of a polynomial and of its derivative.
92599
Prove there generally is no isomorphism between $R[x]/(x^2-a)$ and $R^2$
67605
Different proof that $\sqrt{2}$ is irrational
76490
Proving that $\cos(\arcsin(x))=\sqrt{1-x^2}$
151806
Prove that $A^k = 0 $ iff $A^2 = 0$
65297
Proof that for $a,b,c\in \mathbb{R}$, hold that $\left |\sqrt {a^2+b^2}-\sqrt {a^2+c^2} \right |\leq \left |b-c \right |$.
143733
Is this proof that $\sqrt 2$ is irrational correct?
101872
Prove that $\gcd(a^2, b^2) = \gcd(a, b)^2$
125212
How to Show that the Only Subspaces of $R^2$ are the zero subspace, $R^2$ itself, and the lines through the origin