User Robert Bryant

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Which norms have rich isometry groups?

answered May 10, 2011 at 12:25

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Examples of non isometric surfaces having the same curvature function

answered Sep 22, 2014 at 8:58

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Are there more "types" of derivatives than "symmetric" or "alternating"?

answered Feb 14, 2014 at 20:04

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differential equation of conics

answered Sep 9, 2015 at 9:54

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No normal coordinates on general Finsler manifolds

answered Feb 6, 2016 at 12:11

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Local differential geometry and invariant theory

answered Mar 6, 2016 at 20:02

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Relation between harmonic vector field and harmonic 1-form

answered May 9, 2016 at 15:18

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A variant of the Monge-Cayley-Salmon theorem?

answered Jan 27, 2017 at 2:18

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Is it possible to prove unboundedness of 3rd order ODE?

answered Jan 24, 2019 at 22:59

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Geometric description of a certain sphere bundle

answered Aug 19, 2018 at 10:10

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Taylor expansion of the metric tensor in the normal coordinates

answered Dec 24, 2020 at 11:54

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Unique almost complex structure up to diffeomorphism

answered Oct 7, 2020 at 20:54

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Plateau's Problem from an annulus

answered Oct 10, 2020 at 9:21

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How to learn intrinsic torsion

answered Jan 24 at 12:51

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Isometry group of a left-invariant Riemannian metric on $\mathrm{SU}(2)$

answered Jul 25 at 15:08

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Is the set of real matrices with at least one real logarithm closed under multiplication?

answered Feb 7, 2023 at 16:47

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Maximum symmetry metric on $ \mathbb{C}P^n $

answered Nov 3, 2022 at 22:52

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A quadratic $O(N)$ invariant equation for 4-index tensors

answered Nov 13, 2022 at 13:08

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Kähler metric with two compatible complex structures

answered Dec 19, 2022 at 15:06

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Does the first Laplacian eigenfunction on a homogeneous space have a unique maximum?

answered May 9, 2022 at 18:11

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Generalizing the Pfaffian: families of matrices whose determinants are perfect powers of polynomials in the entries

answered Jan 9, 2021 at 20:28

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Surfaces with non-constant negative curvature

answered May 7, 2020 at 10:28

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Topology/geometry of $O(2n)/U(n)$

answered Dec 29, 2019 at 19:49

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Are these two structures isometric?

answered Jan 4, 2020 at 16:50

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Which curves are boundary of pseudoholomorphic curves?

answered Jun 12, 2020 at 19:44

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Stabilizer of Sp(n) and U(n) in GL(n)

answered Nov 30, 2018 at 17:43

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Principal curvatures of $\mathbb{R}^{n^2}$-embedded SO(n)

answered Oct 21, 2018 at 16:00

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Riemannian vs Non-Riemannian curvature

answered Jan 5, 2018 at 2:40

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Automorphisms and isometries of the quaternions

answered Mar 9, 2017 at 12:31

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generalisation of umbilic surfaces

answered Jul 27, 2017 at 11:44

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998 Answers

Which norms have rich isometry groups?

Examples of non isometric surfaces having the same curvature function

Are there more "types" of derivatives than "symmetric" or "alternating"?

differential equation of conics

No normal coordinates on general Finsler manifolds

Local differential geometry and invariant theory

Relation between harmonic vector field and harmonic 1-form

A variant of the Monge-Cayley-Salmon theorem?

Is it possible to prove unboundedness of 3rd order ODE?

Geometric description of a certain sphere bundle

Taylor expansion of the metric tensor in the normal coordinates

Unique almost complex structure up to diffeomorphism

Plateau's Problem from an annulus

How to learn intrinsic torsion

Isometry group of a left-invariant Riemannian metric on $\mathrm{SU}(2)$

Is the set of real matrices with at least one real logarithm closed under multiplication?

Maximum symmetry metric on $ \mathbb{C}P^n $

A quadratic $O(N)$ invariant equation for 4-index tensors

Kähler metric with two compatible complex structures

Does the first Laplacian eigenfunction on a homogeneous space have a unique maximum?

Generalizing the Pfaffian: families of matrices whose determinants are perfect powers of polynomials in the entries

Surfaces with non-constant negative curvature

Topology/geometry of $O(2n)/U(n)$

Are these two structures isometric?

Which curves are boundary of pseudoholomorphic curves?

Stabilizer of Sp(n) and U(n) in GL(n)

Principal curvatures of $\mathbb{R}^{n^2}$-embedded SO(n)

Riemannian vs Non-Riemannian curvature

Automorphisms and isometries of the quaternions

generalisation of umbilic surfaces