What’s hot at mathoverflow 18/17
Open subsets of Euclidean space in dimension 5 and higher admitting exotic smooth structures
Non-positively curved groups and spaces
This week there was the workshop “Non-positively curved groups and spaces” in Regensburg.
Future features at Zentralblatt?
This week there was the common meeting of the Austrian and German mathematical societies at the University of Salzburg and besides many interesting math talks there was also a session about the future of knowledge management.
What’s hot at mathoverflow 17/17
3D Billiards problem inside a torus
What’s hot at mathoverflow 16/17
Finite-order self-homeomorphisms of \({\mathbb R}^n\)
Quasiconvexity and Dehn filling
One of the most important theorems in 3-manifolds topology is Agol’s Theorem asserting that every closed 3-manifold is virtually fibered and in particular virtually Haken. Agol proved this theorem in early 2012 for closed hyperbolic manifolds. The general (closed) case reduces to hyperbolic manifolds via geometrization. The case of cusped hyperbolic manifolds was left open … Continue reading "Quasiconvexity and Dehn filling"
Kuhkubus
Spiegel Online reports today (Escher in 3D) on work of Alexander Gürten from the contest Math Creations. It is about bulls tesselating Euclidean space. Have a look at the linked video:
What’s hot at mathoverflow 15/17
Intuition for symplectic groups
Snowflakes and unicorns
The New York Times has an article about the untimely death of Marina Ratner and Maryam Mirzakhani: With Snowflakes and Unicorns, Marina Ratner and Maryam Mirzakhani Explored a Universe in Motion
A rank-one CAT(0) group is determined by its Morse boundary
In this series we will introduce and discuss new preprints that are somehow related to the topics of the programme “Geometry at Infinity”. By incidence, this first article fits not only the topic, but also the title of this blog: the boundary at infinity. Charney, Murray: A rank-one CAT(0) group is determined by its Morse … Continue reading "A rank-one CAT(0) group is determined by its Morse boundary"
