Subject: VEH technique

From: Hamsa Subramanian <[email-masked]>
Date: Sun, 6 Nov 1994 19:26:49 -0330 (NST)

Hello netters,

I am looking in various papers using (VEH)Valence Effective Hamiltonian
Technique for calculating Band Gaps. 

1. I would like to know more about this methods.
2. Is there is any Package useful for this method.
3. Alternative methods for calculating Band Gaps.

Kindly help me regarding the above three. 

Thanks,

hamsa.