Hu, JianxunWang, Bai-Ling2016-03-182016-03-180002-9947http://hdl.handle.net/1885/100587In this paper, we define a stringy product on K*orb(X) ⊗ ℂ, the orbifold K-theory of any almost complex presentable orbifold X. We establish that under this stringy product, the delocalized Chern character chdeloc: K*orb(X) ⊗ ℂ -→ H*C R(X), after a canoni© 2013 American Mathematical SocietyOrbifold K-theorydelocalized Chern characterChen-Ruan cohomology201310.1090/S0002-9947-2013-05834-52016-06-14