5 papers
On the equivariant cohomological rigidity of semi-free Hamiltonian circle actions
Liat Kessler, Nikolas Wardenski
We consider semi-free Hamiltonian -manifolds of dimension six and establish when the equivariant cohomology and data on the fixed point set determine the isomorphism type. Gon…
On isomorphisms of semi-free Hamiltonian -manifolds and fixed point data
Liat Kessler, Nikolas Wardenski
Following Gonzales, we answer the question of whether the isomorphism type of a semi-free Hamiltonian -manifold of dimension six is determined by certain data on the critical…
On GKM fiber bundles and realizability with full flag fibers
Oliver Goertsches, Panagiotis Konstantis, Nikolas Wardenski +1
We investigate under which conditions an equivariant fiber bundle whose base, total space and fiber are GKM manifolds induces a fibration or fiber bundle of the corresponding GKM g…
Characterization of locally standard, -equivariantly formal manifolds in general position
Nikolas Wardenski
We give a characterization of locally standard, -equivariantly formal manifolds in general position. In particular, we show that for dimension at least , to ev…
Multiplicity free U(2)-actions and triangles
Oliver Goertsches, Bart Van Steirteghem, Nikolas Wardenski
We classify the compact, connected multiplicity free Hamiltonian U(2)-manifolds with trivial principal isotropy group whose momentum polytope is a triangle.