Filippo Bianchi's user avatar
Filippo Bianchi's user avatar
Filippo Bianchi's user avatar
Filippo Bianchi
  • Member for 2 years, 7 months
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7 votes
3 answers
165 views

If $n>1$, the square of the odd Fibonacci number $F(2n+1)$ can be written as the sum of exactly $F(2n+1)+1$ nonzero squares.

3 votes
1 answer
64 views

Quotient of $R[x,x^{-1}]$ as $R[x]$-module

3 votes
1 answer
63 views

Relation between the two spin structures of $S^1$

3 votes
0 answers
112 views

Operation $\ominus$ between Hilbert spaces

2 votes
1 answer
150 views

Presentation of a group with the same number of generators and relations

2 votes
1 answer
42 views

Relating the pairwise determinants of $n$ elements of $\mathbb{Z}^2$

1 vote
0 answers
70 views

Heegaard Floer homology of a genus two diagram of $S^3$

1 vote
0 answers
70 views

Lattice embeddings in $\mathbb{Z}^n$

1 vote
1 answer
66 views

Obstruction theory and maps from a 3-manifold to the sphere

1 vote
0 answers
101 views

Smooth simple representatives of elements of the fundamental group

1 vote
1 answer
45 views

Tying a portion of a knot diagram

1 vote
0 answers
42 views

Smoothness of group action on Borel spaces

1 vote
0 answers
61 views

A question on finitely generated $\mathbb{C}$-algebra

1 vote
0 answers
121 views

Quotient of an affine scheme under the action of a finite group

1 vote
2 answers
87 views

Coefficient of integral dependence and prime ideals

0 votes
0 answers
38 views

Regularity of quotient of polynomial ring

0 votes
0 answers
110 views

Surjectivity of proper morphism

0 votes
0 answers
133 views

Hyperbolic manifolds that are quotient of hyperbolic space

0 votes
0 answers
98 views

Unimodular matrices and row operations

0 votes
0 answers
54 views

A variation on the Markov Diophantine equation

0 votes
0 answers
14 views

Tensor diagrams representing scalars