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Results tagged with spherical-geometry
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user 1441
16
votes
3
answers
976
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Actions on Sⁿ with quotient Sⁿ
What is known about isometric actions on $\mathbb S^n$ such that the quotient space is homeomorphic to $\mathbb S^n$?
Comments.
I am mostly interested in (maybe trivial) properties of such acti …
- 45k
16
votes
2
answers
602
views
why most of the angles are right
The Coxeter–Dynkin diagrams tell us that in a spherical Coxeter simplex most of the dihedral angles are right. Say among $\tfrac{n{\cdot}(n+1)}2$ dihedral angles we can have at most $n$ angles which a …
- 45k