A Map which assigns each a Vector Function . Flows are generated by vector fields and vice versa. A vector field is a Section of its Tangent Bundle.
See also Flow, Scalar Field, Seifert Conjecture, Tangent Bundle, Vector, Wilson Plug
References
Gray, A. ``Vector Fields '' and ``Derivatives of Vector Fields .'' §9.4-9.5 in
Modern Differential Geometry of Curves and Surfaces. Boca Raton, FL: CRC Press, pp. 171-174 and 175-178, 1993.
Morse, P. M. and Feshbach, H. ``Vector Fields.'' §1.2 in
Methods of Theoretical Physics, Part I. New York: McGraw-Hill, pp. 8-21, 1953.