Writing $e_1\otimes e_1+e_2\otimes e_2$ in another way
58435
Condition for a tensor to be decomposable
147564
Why does $(A/I)\otimes_R (B/J)\cong(A\otimes_R B)/(I\otimes_R 1+1\otimes_R J)$?
102816
multiplication equivalent of the summation symbol
33741
If $A\simeq\prod A_i$ then $\sum e_i=1$
34059
$(a^{2^n}+1,a^{2^m}+1)=1 or 2$
102030
Getting the expectation symbol to behave like $\sum$ instead of $\Sigma$
111746
$(A/\mathfrak{a}) \otimes_A M \simeq M / \mathfrak{a}M$ by tensoring the canonical exact sequence.
112644
The product of two numbers that can be written as the sum of two squares
72506
An example s.t. $E(E(X|\mathcal F_1)|\mathcal F_2)\neq E(E(X|\mathcal F_2)|\mathcal F_1)$
85882
Show that $1\otimes (1,1,\ldots)\neq 0$ in $\mathbb{Q} \otimes_{\mathbb{Z}} \prod_{n=2}^{\infty} (\mathbb{Z}/n \mathbb{Z})$.
89533
$\mathcal{K}(L^2(\mathbb{R}^m \times \mathbb{R}^n)) = \mathcal{K}(L^2(\mathbb{R}^m)) \otimes \mathcal{K}(L^2(\mathbb{R}^n))$?
53687
Why is $\text{Hom}(V,W)$ the same thing as $V^* \otimes W$?
64803
Counting two ways, $\sum \binom{n}{k} \binom{m}{n-k} = \binom{n+m}{n}$
75942
Arranging 5 D's, 6 E's and 3 F's such that the First D precedes the First E which precedes the First F
46546
Express $-1+i$ in exponential form.
4559
How many ways can $133$ be written as sum of only $1s$ and $2s$
142994
How to show $\sum_{i=1}^{n} \binom{i}{2}=\binom{n+1}{3}$?