Philip Engel's user avatar
Philip Engel's user avatar
Philip Engel's user avatar
Philip Engel
  • Member for 12 years, 6 months
  • Last seen more than a month ago
12 votes
0 answers
358 views

Structures between PL and smooth

8 votes
1 answer
2k views

Contracting a curve of negative self-intersection on a surface

7 votes
1 answer
339 views

Modularity of certain theta series associated to hyperbolic lattice

5 votes
1 answer
273 views

Quotient of a smooth projective surface by an involution

5 votes
1 answer
597 views

Is there a way to define Hecke operators "inherently" as certain endomorphisms of the Jacobian?

5 votes
0 answers
207 views

Algebraic deformation invariance of Gromov-Witten invariants

4 votes
1 answer
339 views

Exotic $\mathbb{R}^4$ with a complex structure?

4 votes
0 answers
241 views

Is there an analogue of the linking pairing in etale, crystalline, etc cohomology theories?

4 votes
0 answers
187 views

When is a toric variety a Poincare duality space?

4 votes
0 answers
115 views

Factors of polynomials of bounded height

4 votes
1 answer
187 views

“Logarithmic” form of Kodaira Embedding

3 votes
0 answers
153 views

(Implemented) algorithm for Hodge numbers

3 votes
1 answer
329 views

Analytically but not algebraically smoothable singularity

2 votes
0 answers
369 views

Complete curves in $M_g$ and Theta Characteristics

2 votes
2 answers
615 views

Almost Toric Symplectic Four-Manifolds

2 votes
0 answers
145 views

Open Period Integrals of Elliptically Fibered K3 surfaces

0 votes
0 answers
205 views

Hyperbolic Space, Lattice Isometries, and Polyhedral Fundamental Domains