17 citations · 19 across the 6 of their papers we have counts for
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math.CA2005
Jacobians and branch points of real analytic open maps
Morris W. Hirsch
The main result is that the Jacobian determinant of an analytic open map from Euclidean n-space to itself does not change sign. A corollary of the proof is that the set of branch p…
math.DS2005
Periodic orbits and homoclinic loops for surface homeomorphisms
Morris W. Hirsch
Let p be a saddle fixed point for an orientation-preserving surface diffeomorphism f admitting a homoclinic point q. Let V be an open 2-cell bounded by a simple loop formed by two…