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math.AG2003
Horn's Problem, Vinnikov Curves and the Hive Cone
David E Speyer
A Vinnikov curve is a projective plane curve which can be written in the form det(xX+yY+zZ)=0 for X, Y and Z positive definite Hermitian n by n matrices. Given three n-tuples of po…
math.AG2003★ 5 cited
The Tropical Grassmannian
David Speyer, Bernd Sturmfels
In tropical algebraic geometry, the solution sets of polynomial equations are piecewise-linear. We introduce the tropical variety of a polynomial ideal, and we identify it with a p…