Finding the inverse of $I+N$ where $N$ is nilpotent
7034
Prove that $A+I$ is invertible if $A$ is nilpotent
74318
Find the nilpotents in $\mathbb{Z}_3[x]/(x^2-1)$
1576
Finding the elements in the group of units of the ring of integers modulo n that are their own inverse.
69833
Number of elements not equal to their inverses is even number
75351
How to find inverse Modulo?
149292
Inverse of a diagonal matrix plus a constant
78298
On the nilpotence of the matrix $AB-BA$
66968
if $a,b$ are nilpotent elements of a commutative ring $R$, show that $a+b$ is also nilpotent
33992
Let $\theta$ be a root of $p(x)=x^3+9x+6$, find the inverse of $1+\theta$ in $\mathbb{Q(\theta)}$
113109
Showing that a map is bijective and finding its inverse
130268
How to prove that a nilpotent matrix is not invertible?
26562
Inverse of $f(x)=\sin(x)+x$
120976
Proving $\sum_{k=0}^{n}k{n\choose k}^2 = n{2n-1 \choose n-1} $
67208
Can we say that there exist an integer $n$ such $A+nB$ invertible?
77554
Inverse of the sum of matrices
14873
$1+a$ and $1-a$ in a ring are invertible if $a$ is nilpotent
126025
Computing the inverse of a permutation