Tsujikawa, Phys. Rev. D 77, 023507 (2008)

B. Relations between the model parameters and the propertyof the finite-time future singularities・f s and û characterize the theory ofnon-local gravity.h s , t q・s and specify the property ofthe finite-time future singularity.・・ñ cø cand determine a leading-order solution in terms offor the gravitational field equations in the flat FLRW space-time.When ,for ,for and ,for ,H ú effú sfor , asymptotically becomes finite and alsoasymptotically approaches a finite constant value .for , →∞,,No. 17