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JPhy
  • Member for 10 years, 2 months
  • Last seen more than a week ago
  • United Kingdom
12 votes
1 answer
1k views

Understanding etale cohomology versus ordinary sheaves

11 votes
1 answer
2k views

Lie groups as manifolds

8 votes
1 answer
1k views

Tricky steepest descent applied to an inverse Fourier transform

7 votes
0 answers
118 views

Serre's paper on non-existence of singular cohomology analogue for schemes

6 votes
1 answer
273 views

On the Arakelov metric in the construction of the Kawazumi-Zhang invariant

5 votes
1 answer
2k views

Schwarzschild metric tensor normal vectors

5 votes
2 answers
1k views

Intuition for definition of projective module

3 votes
0 answers
79 views

Cohomology theory for vertex operator algebras?

3 votes
1 answer
129 views

Visualising the scheme $\mathrm{Spec} \, k[x,y_1,y_2,\dots,y_n]/(y_1^2,\dots,y_n^2)$

3 votes
2 answers
547 views

An asymptotic expansion involving the gamma function in QFT

3 votes
2 answers
1k views

$[A^n,B]$ in terms of nested commutators

3 votes
1 answer
105 views

Confusion with automorphisms of $\mathfrak{sl}_2$

3 votes
1 answer
67 views

Modules of quotients of enveloping algebras

3 votes
1 answer
371 views

Understanding the notation $\nabla_n K_{bd}$ for covariant derivatives, with $n$ a vector

3 votes
2 answers
693 views

Computing Normals from Metric Tensor

3 votes
0 answers
81 views

Explicit calculations of period matrices for algebraic varieties

2 votes
0 answers
41 views

Properties of modified Ricci-flat condition

2 votes
0 answers
61 views

Link between irrep decomposition and representation map

2 votes
1 answer
759 views

De Rham cohomology, and forms on manifolds

2 votes
2 answers
140 views

Establishing compactness of manifolds for the purposes of applying Chern-Gauss-Bonnet

2 votes
1 answer
223 views

Evaluating $\int_0^\infty dn \, \frac{x^n}{(3n+1)(3n+2)}$

2 votes
1 answer
974 views

Understanding sheaf of relative differentials for a scheme

2 votes
1 answer
180 views

Checking vanishing at cusps from the $q$-expansion

2 votes
0 answers
60 views

Cohomology of varieties defined solely by their embedding equation

2 votes
0 answers
50 views

Modular group with a finite order $T$

2 votes
0 answers
112 views

Applications of Galois cohomology outside number theory

1 vote
0 answers
68 views

Integral representation of ${}_3 F_2$ allowing negative integers

1 vote
0 answers
28 views

Making sense of rational powers of the $j$-invariant

1 vote
0 answers
46 views

How do you evaluate the $q$-series of expressions like $j(\tau)^{-1/5}$?

1 vote
1 answer
391 views

Cohomology beyond Hartshorne's Algebraic Geometry