If $A$ is an associative algebra Show that $End_{A}(A)=A^{op}$ the algebra with opposite multiplication
41398
For a ring $R$, does $\operatorname{End}_R(R)\cong R^{\mathrm{op}}$?
106442
Show that AB is singular if A is singular
20346
'Algebraic' way to prove the boolean identity $a + \overline{a}*b = a + b$
18817
Does commutativity imply Associativity?
144502
Showing that $A\cap B = A\setminus (A\setminus B)$
37252
How can I show that $\begin{pmatrix} 1 & 1 \\ 0 & 1\end{pmatrix}^n = \begin{pmatrix} 1 & n \\ 0 & 1\end{pmatrix}$?
155828
How do I show that $A$ and $A^T$ are similar, given that the minimal polynomial of $A$ splits over $\mathbb{F}$?
115782
Proof $\mathbb{A}^n$ is irreducible, without Nullstellensatz
142815
Is Left associativity only for Postfix expression?
27821
A problem on rank of $A$ and $\operatorname{adj}(A)$
78736
Check my proof that $(ab)^{-1} = b^{-1} a^{-1}$
120010
Show that $\aleph_{\alpha}^{\aleph_{1}} = \aleph_{\alpha}^{\aleph_{0}}\cdot 2^{\aleph_1}$
145507
Is $K[a,b]=K(a,b)$ for algebraic $a, b$?
103695
Prove Inverses not need be Unique if Associativity fails
83595
Proving that $\mathbb{A}=\{\alpha \in \mathbb{C}: \alpha \text{ is algebraic over } \mathbb{Q} \}$ is not a finite extension
79679
Let $\alpha, \beta \in \mathbb{C}$, such that $\alpha + \beta$, and $\alpha\beta$ are algebraic. Show that $\alpha$ and $\beta$ are algebraic.
56370
Associative operation on a set $S$