21 citations · 86 across the 9 of their papers we have counts for
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math.AG2012★ 10 cited
Variations on a theme of Grothendieck
Johan Martens, Michael Thaddeus
Grothendieck and Harder proved that every principal bundle over the projective line with split reductive structure group (and trivial over the generic point) can be reduced to a ma…
math.SG2012★ 6 cited
On Non-Abelian Symplectic Cutting
Johan Martens, Michael Thaddeus
We discuss symplectic cutting for Hamiltonian actions of non-Abelian compact groups. By using a degeneration based on the Vinberg monoid we give, in good cases, a global quotient d…