Iffor sufficiently small
then z is a multiple zero of some 0,1 power series.
By Theorem 3.1, ifis small enough we can pick 0,1 power series
and zeros
of
such that
and
as
. By taking a subsequence we may assume that the coefficient of
in
is eventually constant for large n, for each k. By a Rouché's Theorem argument, the pairs of zeros
of
must converge to (at least) a double zero at z of
.