K-theoretic invariants for Floer homology

This paper defines two K-theoretic invariants, Wh1 and Wh(2), for individual and one-parameter families of Floor chain complexes. The chain complexes are generated by intersection points of two Lagrangian submanifolds of a symplectic manifold, and the boundary maps are determined by holomorphic curves connecting pains of intersection points. The paper proves that Wh(1) and Wh(2) do not depend on the choice of almost complex structures and are invariant under Harniltonian deformations. The proof of this invariance uses properties of holomorphic curves, parametric gluing theorems, and a stabilization process.