EntityQ4426755· pop 8· linked from 72 articlescomplex projective planeSign in to save2-dimensional complex projective spaceConnectionsmathematicsEntityprojective geometryEntityRiemann sphereEntityquadricEntityRiemannian manifoldEntityGaussian curvatureEntityhomogeneous coordinatesEntitybirational geometryEntitycomplex manifoldEntityBetti numberEntityalgebraic surfaceEntityblowing upEntityFubini–Study metricEntitytoric varietyEntitycomplex projective spaceEntityrational surfaceEntitycircular points at infinityEntitysphere theoremEntityCremona groupEntityCategoriesAlgebraic surfacesComplex surfacesProjective geometry