User Lev Borisov

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?

asked Mar 22, 2014 at 0:17

26 votes

1 answer

1k views

Real square roots of symmetric matrices

asked Feb 25, 2016 at 16:37

15 votes

1 answer

976 views

Derived categories of arithmetic schemes?

asked Nov 5, 2013 at 2:53

12 votes

1 answer

854 views

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

asked Dec 4, 2013 at 18:09

11 votes

2 answers

803 views

Determinant and eigenvalues of a specific matrix

asked Jan 2, 2014 at 1:33

11 votes

0 answers

394 views

What is Koszul dual of a curve?

asked Jan 23, 2016 at 16:46

10 votes

1 answer

544 views

Newton polygons of modular polynomials

asked Jul 23, 2014 at 21:07

10 votes

1 answer

594 views

K3 surfaces that correspond to rational points of elliptic curves

asked Jul 30, 2014 at 17:04

10 votes

3 answers

836 views

Combinatorial interpretation of composition of power series?

asked Jul 17, 2014 at 0:04

9 votes

1 answer

322 views

Degenerations of modular curves

asked Aug 20, 2013 at 12:39

8 votes

2 answers

452 views

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

asked Mar 9, 2014 at 15:44

6 votes

1 answer

485 views

Matrix factorizations as a dg-category?

asked May 14, 2015 at 0:45

4 votes

0 answers

89 views

Identities for ${~}_3\phi_1$?

asked Jan 26, 2015 at 18:34

4 votes

0 answers

182 views

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

asked Nov 10, 2013 at 22:35

4 votes

2 answers

287 views

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

asked Nov 15, 2013 at 0:04

4 votes

0 answers

182 views

Arithmetic analogs of vertex algebras?

asked Jul 8, 2014 at 23:55

4 votes

0 answers

147 views

Zeta functions with Brauer class

asked Dec 4, 2014 at 20:53

3 votes

2 answers

587 views

Minor technical question in diff geometry

asked Nov 27, 2013 at 14:27

3 votes

0 answers

201 views

Generators for fake projective planes groups

asked May 4, 2015 at 12:27

3 votes

0 answers

88 views

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

asked Aug 7, 2014 at 21:17

3 votes

0 answers

332 views

Universal cover of elliptic curve without a point

asked Jul 22, 2014 at 22:28

3 votes

0 answers

237 views

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

asked Apr 17, 2022 at 18:48

2 votes

0 answers

94 views

Looking for modern reference for asymptotic of Barnes integral

asked Oct 27, 2016 at 1:18

2 votes

1 answer

100 views

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

asked Dec 24, 2014 at 21:53

2 votes

1 answer

245 views

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

asked Jan 13, 2015 at 20:30

2 votes

1 answer

128 views

Expressions involving $q$-binomial coefficients?

asked Jan 17, 2015 at 14:53

1 vote

0 answers

178 views

Interpretation of the Gross-Zagier formula for Green function

asked Jul 21, 2014 at 21:53

1 vote

1 answer

299 views

Weierstrass points on modular curves

asked Jan 17, 2014 at 18:28

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28 Questions

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

Real square roots of symmetric matrices

Derived categories of arithmetic schemes?

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

Determinant and eigenvalues of a specific matrix

What is Koszul dual of a curve?

Newton polygons of modular polynomials

K3 surfaces that correspond to rational points of elliptic curves

Combinatorial interpretation of composition of power series?

Degenerations of modular curves

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

Matrix factorizations as a dg-category?

Identities for ${~}_3\phi_1$?

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

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

Arithmetic analogs of vertex algebras?

Zeta functions with Brauer class

Minor technical question in diff geometry

Generators for fake projective planes groups

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

Universal cover of elliptic curve without a point

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

Looking for modern reference for asymptotic of Barnes integral

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

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

Expressions involving $q$-binomial coefficients?

Interpretation of the Gross-Zagier formula for Green function

Weierstrass points on modular curves