Talk:Poincaré map

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Don't we mean 'perihelion', not 'parhelion'? mat_x 07:47, 4 Aug 2004 (UTC)

changed "hyperplane" to "hypersurface" because it needn't be a plane, and very seldom is in practice. Added transversal, because this is normally assumed, if not, then in some parts the hypersurface is invariant under the flow and your poincare map is identity in these parts - very useful.