[Smeagol-discuss] About the decimation of states

[Yusia Rosee]

Hello, Dear all,

 From the output file, I got the following messages:

gensvd: Leads decimation
gensvd: Dim of H1 and S1 :    78
gensvd: Rank of H1:            12
gensvd: Rank of (H1,S1):       25
gensvd: Decimated states:      41
gensvd: Decimation from the right
gensvd: Leads decimation
gensvd: Dim of H1 and S1 :    78
gensvd: Rank of H1:            12
gensvd: Rank of (H1,S1):       25
gensvd: Decimated states:      41
gensvd: Decimation from the right

Could you tell me what is done in the decimation process? What does 
"Decimation from the right" or "Decimation from the left" mean, please? 

Thank you!

All the best,
Yusia