User j0equ1nn

22 votes

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What would you want to see at the Museum of Mathematics?

answered Dec 30, 2019 at 11:53

2 votes

How come Cartan did not notice the close relationship between symmetric spaces and isoparametric hypersurfaces?

answered Mar 17, 2018 at 1:39

2 votes

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Some general properties of arithmetic groups of simplest type

answered Mar 9, 2015 at 15:10

1 vote

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How many non-commensurable non-arithmetic manifolds have a quaternion algebra like this?

answered Mar 19, 2016 at 23:23

0 votes

How should we define $\mathrm{PSL}_2$ of a Clifford group?

answered Feb 9, 2017 at 7:19

0 votes

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How should we define $\mathrm{PSL}_2$ of a Clifford group?

answered Feb 13, 2017 at 23:09

0 votes

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Trace field of a hyperbolic $3$-manifold with a totally geodesic subsurface

answered Dec 9, 2017 at 20:01

0 votes

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Does this count as a canonical decomposition for non-elementary hyperbolic 3-orbifolds?

answered Apr 30, 2015 at 18:58

0 votes

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Real slices of Minkowski space, using a complex quadratic form

answered May 21, 2015 at 0:58

0 votes

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How can we explicitly verify a canonical Dirichlet domain for this hyperbolic punctured torus

answered Sep 26, 2015 at 21:45

0 votes

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Definition of level N congruence subgroup of an arithmetic group, useful for computations

answered Dec 18, 2013 at 23:20

0 votes

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Frohman & Fine's proof about Bianchi groups as HNN extensions (or anyone else's)

answered Jan 3, 2014 at 0:39

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12 Answers

What would you want to see at the Museum of Mathematics?

How come Cartan did not notice the close relationship between symmetric spaces and isoparametric hypersurfaces?

Some general properties of arithmetic groups of simplest type

How many non-commensurable non-arithmetic manifolds have a quaternion algebra like this?

How should we define $\mathrm{PSL}_2$ of a Clifford group?

How should we define $\mathrm{PSL}_2$ of a Clifford group?

Trace field of a hyperbolic $3$-manifold with a totally geodesic subsurface

Does this count as a canonical decomposition for non-elementary hyperbolic 3-orbifolds?

Real slices of Minkowski space, using a complex quadratic form

How can we explicitly verify a canonical Dirichlet domain for this hyperbolic punctured torus

Definition of level N congruence subgroup of an arithmetic group, useful for computations

Frohman & Fine's proof about Bianchi groups as HNN extensions (or anyone else's)