Why are L4 and L5 Lagrange points stable as points and not part of a circle?
23518
How are the Lagrange points determined?
155004
Maximal points on an $n$-dimensional ellipsoid
77253
Proof of Lagrange Identity
139868
Linear transformations, $R^5,R^4$
2786
The staircase paradox, or why $\pi\ne4$
9705
Sensitivity to initial conditions and topological transitivity
117104
Is the punctured plane homotopy equivalent to the circle?
113919
Surface of genus $g$ does not retract to circle (Hatcher exercise)
20310
Geometric motivation for negative self-intersection
120404
Showing that the geodesics in hyperbolic upper half-plane model are half circles
102235
Choosing $n$ equidistant points on a circle with given radius and center
39416
The space obtained by identifying the antipodal points of a circle
99312
Why Lagrangian is negative number for a relativistic massive point particle?
23219
The plane minus $n$ points deformation retracts onto...
37589
Connectedness of points with both rational or irrational coordinates in the plane?
156234
Why is the Converse to Lagrange's Theorem False?
88491
Holonomic constraints and degrees of freedom