Structural differences between $2 \mathbb{Z}$, $3 \mathbb{Z}$ as rings.
94747
Show that the rings $2\mathbb{Z}$ and $3\mathbb{Z}$ are not isomorphic.
55900
Is there a ring homomorphism $M_2(\mathbb Z)\to \mathbb Z$?
91222
Isomorphism between $\mathfrak o(4,\mathbb R)$ and $\mathfrak o (3,\mathbb R) \oplus\mathfrak o (3,\mathbb R) $
92420
Characteristic of  a Non-unital Integral Ring
21840
Zero divisors and units for the ring $\mathbb{Z}/n\mathbb{Z}$ with integer $n$
41629
Structure of ideals in the product of two rings
30401
Determining the structure of the quotient ring $\mathbb{Z}[x]/(x^2+3,p)$
137201
Classifying $\mathbb{Z} \times \mathbb{Z} \times \mathbb{Z} / \langle(3,3,3)\rangle$
37929
Classification of prime ideals of $\mathbb{Z}[X]$
60925
Why these are isomorphic each other for given these rings?
102721
Number of elements in the ring $\mathbb Z [i]/\langle 2+2i\rangle$
111104
Ring theory notation question
83115
A set of elements in a reduced unity ring
119067
Basic Ring Theory Question involving the unit element
149973
Showing the following coordinate rings are not isomorphic
114152
Intermediate fields between $\mathbb{Z}_2 (\sqrt{x},\sqrt{y})$ and $\mathbb{Z}_2 (x,y)$
61292
How to know which elements are in the Quotient Ring $\mathbb{Z}[x]/\langle x, 2\rangle$?