A flow defined analogously to the axiom A diffeomorphism, except that instead of splitting the tangent bundle into two invariant sub-bundles, they are split into three (one exponentially contracting, one expanding, and one which is one-dimensional and tangential to the flow direction).
Axiom A Flow
See also
Dynamical SystemExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Axiom A Flow." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/AxiomAFlow.html