Lev Borisov's user avatar
Lev Borisov's user avatar
Lev Borisov's user avatar
Lev Borisov
  • Member for 10 years, 7 months
  • Last seen more than a week ago
35 votes
1 answer
1k views

What is the meaning of $(h^{11},h^{21})\to (h^{11}-240,h^{21}+240)$ in Calabi-Yau threefolds?

26 votes
1 answer
1k views

Real square roots of symmetric matrices

15 votes
1 answer
985 views

Derived categories of arithmetic schemes?

12 votes
1 answer
865 views

Is the universal elliptic curve $\overline M_{1,2}$ a toric stack?

11 votes
2 answers
810 views

Determinant and eigenvalues of a specific matrix

11 votes
0 answers
394 views

What is Koszul dual of a curve?

10 votes
1 answer
552 views

Newton polygons of modular polynomials

10 votes
1 answer
604 views

K3 surfaces that correspond to rational points of elliptic curves

10 votes
3 answers
845 views

Combinatorial interpretation of composition of power series?

9 votes
1 answer
327 views

Degenerations of modular curves

8 votes
2 answers
453 views

Necessary condition on Calabi-Yau manfiold to be a hypersurface in a Fano manifold

6 votes
1 answer
489 views

Matrix factorizations as a dg-category?

4 votes
0 answers
89 views

Identities for ${~}_3\phi_1$?

4 votes
0 answers
182 views

Bounds on dimension of cokernel of $Sym^2(H^0(X,D)) \to H^0(X,2D)$?

4 votes
2 answers
289 views

On $n$-th cohomology of $M_{0,n+3}$

4 votes
0 answers
183 views

Arithmetic analogs of vertex algebras?

4 votes
0 answers
147 views

Zeta functions with Brauer class

3 votes
2 answers
589 views

Minor technical question in diff geometry

3 votes
0 answers
201 views

Generators for fake projective planes groups

3 votes
0 answers
90 views

Finding a divisor on a curve in a given linear equivalence class made with points over a "small" field

3 votes
0 answers
344 views

Universal cover of elliptic curve without a point

3 votes
0 answers
246 views

Explicit computations of finite covers of genus one curves with two points of ramification

2 votes
0 answers
100 views

Looking for modern reference for asymptotic of Barnes integral

2 votes
1 answer
100 views

Generating subgroups of large index by a large chunk of a conjugacy class

2 votes
1 answer
245 views

Are binomial coefficients $F_1$ analogs of $q$-binomial coefficients?

2 votes
1 answer
129 views

Expressions involving $q$-binomial coefficients?

1 vote
0 answers
178 views

Interpretation of the Gross-Zagier formula for Green function

1 vote
1 answer
299 views

Weierstrass points on modular curves