Continuation maps give functorial morphisms between Morse fundamental groups, including on different manifolds via grafted trajectories, and the Morse fundamental group of an interpolation function on M×R is a relative fundamental group.
Fundamental group in stable Morse theory
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abstract
Morse theory relates algebraic topology invariants and the dynamics of the gradient flow of a Morse function, allowing to derive information about one out of the other. In the case of the homology, the construction extends to much more general settings, and in particular to the infinite dimensional setting of the celebrated Floer homology in symplectic geometry. The case of the fundamental group is quiet different however, and the object of this paper is to provide a dynamical description of the fundamental group in the stable Morse setting, which can be thought of as an intermediate case between the Morse and the Floer settings.
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Continuation maps for the Morse fundamental group
Continuation maps give functorial morphisms between Morse fundamental groups, including on different manifolds via grafted trajectories, and the Morse fundamental group of an interpolation function on M×R is a relative fundamental group.