"projective algebraic set" . "Projective variety#Variety structure" . "smooth projective curve" . "projective algebraic variety" . . "projective" . "Projective_variety#Complex_projective_varieties" . . . "complex projective varieties" . . "projective hypersurface" . "Projective variety" . "complex projective variety" . . "projective subvariety" . "projections" . "projective variety#Projections" . "projective varieties" . "projective variety#projective completion" . . "Projective variety" . "Projective variety#Projective schemes" . "projective variety" . "nonsingular projective variety" . .