THE POSSIBLE EVOLUTIONARY SCENARIOS FOR THE ECLIPSING BINARY-SYSTEM PSR-1718-19

Some possible models for the eclipsing binary system PSR 1718-19 have been reviewed. The evolutionary picture based on Zwitter (1993) stripp ed main-sequence (M-S) turnoff star model is explicitly calculated and discussed. Both the accretion induced collapse (AIC) scenario with th e young neutron star and the capture scenario with the old neutron sta r are discussed. Also the evolutionary scenario with the destructive t idal heating of the PSR 1718-19 is discussed, (Verbunt 1994). It is sh own that the AIC condition may be favourable in the stripped M-S turn- off scenario since then it is possible to avoid a nova explosion with violent mass loss.