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math.SG2005
A symplectic approach to van den Ban's convexity theorem
Philip Foth, Michael Otto
Let G be a complex semisimple Lie group and τa complex antilinear involution that commutes with the Cartan involution. If H denotes the connected subgroup of τ-fixed points in G, a…
math.SG2004
A refinement of the complex convexity theorem via symplectic techniques
Bernhard Kroetz, Michael Otto
We apply techniques from symplectic geometry to extend and give a new proof of the complex convexity theorem of Gindikin-Kroetz.
math.SG2003
Lagrangian submanifolds and moment convexity
Bernhard Kroetz, Michael Otto
We consider a Hamiltonian torus action on a compact connected symplectic manifold M. For a certain class of Lagrangian submanifolds Q of M we show that the image of Q under the mom…