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billy192
  • Member for 4 years, 7 months
  • Last seen more than 3 years ago
11 votes
1 answer
1k views

Homology of the Klein bottle using cellular homology

3 votes
1 answer
268 views

Mapping cone as a Moore space

2 votes
0 answers
458 views

Homology of a disjoint union

2 votes
0 answers
37 views

Ring automorphisms between cluster algebras of finite type $A$

2 votes
0 answers
72 views

Inverse limit of rings of polynomials in many variables [duplicate]

1 vote
1 answer
78 views

Question about the elements of $\operatorname{Hom}_k(k,V)$

1 vote
1 answer
1k views

Weyl group of type $A_n$

1 vote
1 answer
203 views

Ring homomorphism between fields of rational functions in many indeterminates

1 vote
1 answer
68 views

Surjectivity of a composition of two module homomorphisms

1 vote
1 answer
198 views

Homology of $\mathbb{R}P^2$ using cellular homology - verification.

1 vote
1 answer
116 views

Embedding a pointed topological space into a Eilenberg-MacLane space of its homology group

1 vote
1 answer
86 views

Existence of the inverse limit

1 vote
0 answers
61 views

Showing that ring generated by a subset is isomorphic to a quotient ring

0 votes
1 answer
98 views

Zero element in an inverse limit in category of rings

0 votes
1 answer
24 views

Embedding the vertex of a cone inside inverse limit

0 votes
1 answer
27 views

Questions about $Y$-systems

0 votes
1 answer
307 views

Homeomorphism between a mapping space and a product space

0 votes
0 answers
32 views

Continuous maps between $i$-spheres and space $X$

0 votes
0 answers
24 views

Acting via a map-acceptable abuse of language?

0 votes
0 answers
73 views

Question about an inverse system and its cone

0 votes
0 answers
46 views

Question about inverse system and inverse limit

0 votes
0 answers
66 views

Question on a cone of an inverse system.

0 votes
1 answer
32 views

Ring of locally finite matrices