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math.AT1999★ 3 cited
Equivariant K-theory and Equivariant Cohomology
Ioanid Rosu, Allen Knutson
For T an abelian compact Lie group, we give a description of T-equivariant K-theory with complex coefficients in terms of equivariant cohomology. In the appendix we give applicatio…
math.RA1999
The symplectic and algebraic geometry of Horn's problem
Allen Knutson
Horn's problem was the following: given two Hermitian matrices with known spectra, what might be the eigenvalue spectrum of the sum? This linear algebra problem is exactly of the s…