Cubic complexes appear in the theory of finite type invariants so often that one can
ascribe them to basic notions of the theory. In this paper we begin the exposition of
finite type invariants from the ‘cubic’ point of view. Finite type invariants of knots
and homology 3-spheres fit perfectly into this conception. In particular, we get a
natural explanation why they behave like polynomials.
Keywords
cubic complexes, finite type invariants,
polynomial functions, Vassiliev invariants