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3 votes
0 answers
35 views

Understanding exterior differential systems

4 votes
1 answer
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Lie algebra cohomology and Lie groups

4 votes
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Upper bound on the sectional curvature of a Riemannian submersion

2 votes
2 answers
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Is any globally-hyperbolic manifold conformally equivalent to one with complete slices?

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Dirac operator on $\operatorname{Spin}(7)$, $G_2$ and $\operatorname{SU}(3)$ manifolds

2 votes
1 answer
99 views

Slowly increasing smooth mappings with values in a Lie group?

12 votes
2 answers
394 views

Synthetic differential / conformal geometry of Lorentzian manifolds?

6 votes
1 answer
577 views

When is the cut locus a finite tree?

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1 answer
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A Lie group whose Lie algebra is equal to (the Lie algebra? of )all functions with fibrewise polynomial growth

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measure of Haar

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2 answers
802 views

Local existence of non-trivial solutions to first-order linear elliptic system of PDE

13 votes
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Hilbert 16th problem and dynamical Lefschetz trace formula

20 votes
5 answers
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Finding Constant Curvature Metrics on Surfaces without full power of Uniformization

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Bounding norms of symplectic matrix factorisations and non-separable Hamiltonian flows

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