ƚ  V  .    &  & MathTypePSymbol ww 0wf-2 ~(ySymbol ww 0wf-2 ~%)ySymbol ww 0wf-2 ~(ySymbol ww 0wf-2 ~x )yTimes New Romanww 0wf-2 1y2 2y2 e3y2 w2ySymbol ww 0wf-2 -y2 K+yTimes New Romanww 0wf-2 xy2 Oxy2 Lxy & "Systemf !-