From Morse-Smale to all knots and links

We analyse the topological (knot-theoretic) features of a certain codimension-one bifurcation of a partially hyperbolic fixed point in a flow on ${\mathrm{\Re }}^3$ originally described by Shil’nikov. By modifying how the invariant manifolds wrap around themselves, or ``pleat,‘’ we may apply the theory of templates, or branched two-manifolds, to capture the topology of the flow. This analysis yields a class of flows which bifurcate from a Morse-Smale flow to a Smale flow containing periodic orbits of all knot and link types.