2 papers
math.AP2012
Conical singularities in thin elastic sheets
Stefan Müller, Heiner Olbermann
When one slightly pushes a thin elastic sheet at its center into a hollow cylinder, the sheet forms (to a high degree of approximation) a developable cone, or "d-cone" for short. H…
math.SG2011
On properly essential classical conformal diffeomorphism groups
Stefan Müller, Peter Spaeth
We prove that various classical conformal diffeomorphism groups, which are known to be essential [1], are in fact properly essential. This is a consequence of a local criterion on…