  We analyze the competition of magnetism and superconductivity in the
two-dimensional Hubbard model with a moderate interaction strength, including
the possibility of incommensurate spiral magnetic order. Using an unbiased
renormalization group approach, we compute magnetic and superconducting order
parameters in the ground state. In addition to previously established regions
of Neel order coexisting with d-wave superconductivity, the calculations reveal
further coexistence regions where superconductivity is accompanied by
incommensurate magnetic order.
