"Behrend, Kai"@en . . . . . . "Kai Behrend is a German mathematician. He is a professor at the University of British Columbia in Vancouver.His work is in algebraic geometry and he has made important contributions in the theory of algebraic stacks, Gromov\u2013Witten invariants and Donaldson\u2013Thomas theory. Perhaps, he is best known for Behrend's formula, the generalization of the Grothendieck\u2013Lefschetz trace formula to algebraic stacks."@en . . "Kai Behrend"@en . . "German mathematician" . . . . . . .