How to show a circle and a elipse is homomorphic in $R^{2}$?
48740
What is the homeomorphism between a disk and an ellipse?
94051
How to show that all points are inside of unit circle?
55902
Show $R[x]/(x)\cong R$
117618
How to geometrically prove the focal property of ellipse?
118622
Local diffeomorphism from $\mathbb R^2$ onto $S^2$
141281
How can apply the $L^p$ norm in a circle to $L^2$ norm in a square?
47692
Homomorphic image of a Sylow p-subgroup is Sylow p-subgroup.
82814
Homework question on whether two quotient spaces are homeomorphic
100974
Showing H is a normal subgroup by calculating left and right coset
27728
Question on a homomorphism of a set G.
63447
Prove that the kernel of a homomorphism is a principal ideal. (Artin, Exercise 9.13)
13717
Homomorphisms from $S_4$ to $\mathbb Z_2$
143429
Kernel of ring homomorphism $k[X,Y] \rightarrow k[t^2, t^3]$
93118
How to show that if two integral domains are isomorphic, then their corresponding field of quotients are isomorphic?
116378
Nonhomeomorphic subsets of the plane
40069
The image of a homomorphism is a group?
1026
Ring homomorphism with $\phi(1_R) \neq1_S$