Condation of Stablity in non causal system

[bhq]

Consider a Non causal system which is left sided. ie ROC is inner to the inner most pole. If all poles lies inside the unit circle than the system is stable or not. If unstable than what is the condation of stablity in non causal system??

 

[xulfee]

just try to understand what does it mean physically that poles lie in side unit circle

 

[xulfee]

non causal systems r left sided,so u've to c the roc