Al. a. Tchouproff 
197 
Ep/p; 
Epr p- 
EpI Pj'ph 
Ep/'Pj' 
y<Pipj{l- 
Ep/'p/Pk- 
■piPj-^PiPi 
^ Pi-Pj + -^Pipji^ - ^^P<) - ^^PiPi (1 - 
3 2 
■■ pi Pj Ph -J^pi Pi Ph + -j:. Pi pj Ph 
3 1 
-^,PiPji^-^Pi + ^pf) 
■■ pi' Pi" + ^PiPj (Pi + Pj - ^Pipj) + 
Spi - Sp; + UpiPj) - Y-^PiPj < 1 - "^Pi - "^Pi + ^PiPi) 
■ Pi'PiPh + ^ViPiPh (1 - ^m) - Y2 PiPjPh (3 - Ilpi) 
2 
jr 6 11 6 
Epi PjPh Pf = Pi pj Ph Pf - -^pi Pj Ph Pf + Pi Pj Ph Pf - Yz pi Pi P>> Pf 
> (9), 
and hence : 
E(pi'-pd=0 
E{pi 
-Piy=^Pii^ -Pi) 
1 
-Pi)iPi' -pj)=--^PiPj 
1 
. E{p{-p,)^ = ^^p,(\-p;){\-2pi) 
E{p{ -piY = YP-? (1 - Pi)"' ■¥^,pi{\-pi){l- 6pi + 6p^) 
E(pi' 
E iPi' - Pif {p/ -pj) = - Pi Pj{l- 2pi) 
E(p/- 
Eipi- 
E ipi' - Pi)' (pj -JJjY = ~pi Pj (1 - Pi -Pj + Zpipj) 
2 
P') (pi - Pi) (Pk -Ph) = Y P' Pj P'' 
Pi)'(p/ --pj)--YP'Pj^^-pi^- AnP'Pj^'^-^P'+^P'^ ^ 
- YPi (1 - ^Pi - ^Pi + ^PiPi) 
