  We consider the proximity effect in multiterminal ferromagnet superconductor
(FSF) hybrid structures in which two or three electrodes are connected to a
superconductor. We show that two competing effects take place in these systems:
(i) pair breaking effects due to the response to the exchange field induced in
the superconductor; (ii) a reduction of the \SOP at the interface that takes
place already in NS junctions. We focus on this second effect that dominates if
the thickness of the S layer is small enough. We consider several
single-channel electrodes connected to the same site. We calculate the
superconducting order parameter and the local density of state (LDOS). With two
ferromagnetic electrodes connected to a superconductor we find that the
superconducting order parameter in the ferromagnetic alignment is larger than
the superconducting order parameter in the antiferromagnetic alignment
($\Delta_{\rm F} >\Delta_{\rm AF}$), in agreement with [Eur. Phys. J. B {\bf
25}, 373 (2002)]. If a third spin polarized electrode is connected to a
superconductor we find that $\Delta_{\rm F}-\Delta_{\rm AF}$ can change sign as
the transparency of the third electrode increases. This can be understood from
the fact that the superconducting order parameter is reduced if pair
correlations among the ferromagnetic electrodes increase. If the two
ferromagnetic electrodes are within a finite distance we find Friedel
oscillations in the Gorkov function but we still obtain $\Delta_{\rm F} >
\Delta_{\rm AF}$.
