  For a given pair of maps f,g:X->M from an arbitrary topological space to an
n-manifold, the Lefschetz homomorphism is a certain graded homomorphism
L:H(X)->H(M) of degree (-n). We prove a Lefschetz-type coincidence theorem: if
the Lefschetz homomorphism is nontrivial then there is an x in X such that
f(x)=g(x).
