%0 Journal Article %T Twisted Fourier-Mukai number of a K3 surface %A Shouhei Ma %J Mathematics %D 2008 %I arXiv %X We give a counting formula for the twisted Fourier-Mukai partners of a projective K3 surface. As an application, we describe all twisted Fourier-Mukai partners of a projective K3 surface of Picard number 1. %U http://arxiv.org/abs/0804.4735v2