Re: CCL:qcsid(t) size consistent?

Actually size consistency is the only improventent of quadratic methods
 over classic configuration interaction methods. This is achieved including
 some higher order excitation terms (quadratic in the expansion
 coefficients). You might think of it as a simplification of the e^-T
 expansion which retains size consistency in a coupled cluster calculation.
 Saludos desde Vigo!
    Carlos Silva Lspez
  Dept. Quimica Organica
   Universidade de Vigo
   Phone:0034 986812226