Lev Borisov

 33 Advice for pure-math Phd students 32 The sum of squared logarithms conjecture 17 Interesting examples of vacuous / void entities 15 Die hard nilpotent spaces 10 Eigenvalues of a matrix with entries involving combinatorics

### Reputation (4,796)

 +10 Crepant resolutions of toric varieties +10 What is the meaning of $(h^{11},h^{21})\to (h^{11}-240,h^{21}+240)$ in Calabi-Yau threefolds? +10 which varieties can appear as exceptional divisors? +10 Proof for a Rank-One Decomposition Theorem of Positive (semi) Definite Matrices

### Questions (27)

 36 What is the meaning of $(h^{11},h^{21})\to (h^{11}-240,h^{21}+240)$ in Calabi-Yau threefolds? 24 Real square roots of symmetric matrices 15 Derived categories of arithmetic schemes? 11 What is Koszul dual of a curve? 11 Determinant and eigenvalues of a specific matrix

### Tags (112)

 69 ag.algebraic-geometry × 35 32 symmetric-polynomials 51 polynomials × 6 32 matrix-theory 35 matrices × 7 29 co.combinatorics × 9 33 reference-request × 9 27 linear-algebra × 7 32 inequalities 22 convex-polytopes × 6

### Bookmarks (25)

 64 A bestiary of topologies on Sch 57 “Gross-Zagier” formulae outside of number theory 39 The sequence $a_{n+1}=\left\lceil \frac{-1+\sqrt{5}}{2}a_{n}-a_{n-1} \right\rceil$ is periodic 38 The sum of squared logarithms conjecture 37 Is there a finite family of functions such that the max of any two functions can be dominated by a third?