TAVOLA GENERALE delle
COMBINAZIONI per DUE INTERVALLI
(+X,+Y)
(+X,-Y)
(-X,+Y)
(-X,-Y)
(+Y,+X)
(+Y,-X)
(-Y,+X)
(-Y,-X)
(+X,+X)
(+X,-X)
(-X,+X)
(-X,-X)
(+Y,+Y)
(+Y,-Y)
(-Y,+Y)
(-Y,-Y)