Does the position of the $1$ in a Jordan block matters?
102436
Two different definitions of Jordan canonical form
156093
Show that the chance that it falls entirely on one rectangular block is $\frac{(a-c)(b-c)}{ab}$
124890
Divisibility within a block of natural numbers
31116
Matrix given by $a_{ij} = 1/(i+j)$ is non-singular.
93263
Can contractible subspace be ignored/collapsed when computing $\pi_n$ or $H_n$?
123366
Determinant of block matrices with non-square blocks
107842
Behaviour of ($\overline{a}_n)_{n=1}^{\infty}$ and ($\underline{a}_n)_{n=1}^{\infty}$
27821
A problem on rank of $A$ and $\operatorname{adj}(A)$
35813
Elements operation in the corresponding position of a matrix
55839
Interior of the Graph of $\sin(1/x)$
147564
Why does $(A/I)\otimes_R (B/J)\cong(A\otimes_R B)/(I\otimes_R 1+1\otimes_R J)$?
11998
In how many sequences of length $n$, the difference between every 2 adjacent elements is $1$ or $-1$?
138107
Showing that $\left|\frac{z-a}{1-\bar{a}z}\right|=1$
98535
Are eigenstates of the position operator continuous?
26572
Does the Symmetric difference operator define a group on the powerset of a set?
86518
Does $X$ have a lower bound?
86125
If $A$ is idempotent, then the eigenvalues of $A$ are $0$ or $1$