Zero divisor or unit
14343
Every nonzero element in a finite ring is either a unit or a zero divisor
148550
Units in quotient ring of $\mathbb Z[X]$
122076
A one line proof that one is zero using Mathematica 10
74441
Zero divisors in matrix rings
70974
How can zero divided by $i$ be $2\pi$?
24203
Finding Zero Divisors and Units of Rings $\mathbb{Z}_n \times \mathbb{Z}_m$
32641
Is there a formula to calculate the sum of all proper divisors of a number?
45484
Height unmixed ideal and a non-zero divisor
19884
The units of $\mathbb Z_4[x]$
100340
Invariant dimension property on a ring without zero divisors
134342
Find a polynomial of degree > 0 in $\mathbb Z_4[X]$ that is a unit.
61673
Could I define 0^0 to be 1?
43005
Why does this division result in zero?
31096
Why does division result in zero instead of a decimal?
145354
What is $\gcd(0,0)$?
68807
How to show that the ring $S/A$ has no zero divisors? (Hungerford, Algebra, Problem 12, Chapter III, Section 2)
157954
How many digits does the integer zero have?