Not intirely sure, but its what I thought… ]]>

I think that L* is not regular… for example if we intersect L* with a*b*a* we get L'={a^{i}b^{j}a^{k}| i > j or j > k or i > j > k } which is not regular, then L* isn't regular(closure properties)

correct me if i wrong.

thanks