The combined XLFs of LMXBs in GC (filled circles) and in the field (open circles). L_X is the unabsorbed X-ray luminosity in 0.5–8 keV. The contribution of CXB sources was subtracted and the incompleteness correction was applied. The field XLF is normalized to stellar mass of 10¹⁰ M_⊙. The GC XLF is normalized to have the same number of sources as the field XLF above 10³⁸ erg s^-1.