Constant morphism from $\mathbb{P}^m_k$ to $\mathbb{P}^n_k$ as schemes
111140
Constant morphism between projective varieties
60731
Factorization of a map between CW complexes
29204
$a\equiv\bar a\!\pmod{\!kn}\Rightarrow a\equiv\bar a\!\pmod{\! n};\ $ $(a\bmod kn)\bmod n=a\bmod n.\ $ Congruences persist mod factors of the modulus
128941
How to compute the topological space of fibered product of schemes?
37570
$M + N$ and $M \cap N$ are finitely generated $A$-modules implies $M$ and $N$ finitely generated using exact sequences
154847
homomorphism from $S_3$ to $\mathbb Z/3\mathbb Z$
115088
Surjective morphism of affine varieties and dimension
8417
Natural $(R/I)$-module structure for an $R$-module $M$ annihilated by $I$
5577
If $m$ divides $n$, find a free resolution of $\mathbb{Z}/m$ as a $\mathbb{Z}/n$-module.
99884
Are $\mathbb{Q}_p$ and $\mathbb{Q}_q$ homeomorphic?
95942
$k[x]/(x^n)$ module with finite free resolution is free
127886
Artin's lemma and some morphisms.
51790
Krull Dimension of a scheme
101893
Is there a classification of regular maps $\mathbb{P}^1(k)\to\mathbb{A}^1(k)$?
119648
For which $n$ and $k$ are there nontrivial homomorphisms from $S_n$ to $\mathbb{Z}/k\mathbb{Z}$?
41846
$(\mathbb{R}^n,\|\cdot\|_{p})$ is isometrically isomorphic to $(\mathbb{R}^n,\|\cdot\|_{q})$ iff $p=q,$
80538
Fields extensions over isomorphic fields of different degrees