Marcos Cossarini's user avatar
Marcos Cossarini's user avatar
Marcos Cossarini's user avatar
Marcos Cossarini
  • Member for 14 years, 1 month
  • Last seen more than 2 years ago
  • Brazil
29 votes

Examples of mathematics motivated by technological considerations

29 votes

real symmetric matrix has real eigenvalues - elementary proof

28 votes

Can the unsolvability of quintics be seen in the geometry of the icosahedron?

28 votes
Accepted

Is every finite group a group of "symmetries"?

22 votes

Why is a topology made up of 'open' sets?

15 votes

The "Dzhanibekov effect" - an exercise in mechanics or fiction? Explain mathematically a video from a space station

10 votes

Why worry about the axiom of choice?

8 votes

Why are so few operations with arity bigger than 2?

7 votes

Manifolds admitting flat connections

7 votes

Does every ellipse inside a tetrahedron inside a ball fit in a triangle inside the ball?

4 votes

Which norms have rich isometry groups?

3 votes

Optic fibers after Joseph O'Rourke

3 votes

Intuition for mean curvature

3 votes
Accepted

Relating the angle between two vectors to max and min eigenvalues

2 votes

Does for every vector field there always exist a volume form for which the vector field is a homothety?

2 votes

A family of convex bodies in Banach-Mazur position

1 vote
Accepted

Find symmetries of a tree

1 vote

Towards a metric characterization of Euclidean spaces