EntityQ638846· pop 7· linked from 49 articlesintersection numberSign in to savegeneralized notion of counting curve intersectionsConnectionstangentEntityPoincaré dualityEntitydivisorEntitymathematicsEntityInternational Standard Book NumberEntitydigital object identifierEntityparabolaEntitydiagonalEntityalgebraic geometryEntitybibcodeEntitygraph of a functionEntityQ118398Entityalgebraic topologyEntityif and only ifEntityfinite setEntitypower seriesEntityDirac delta functionEntityJean-Pierre SerreEntitycommutative algebraEntityHeaviside step functionEntityCategoriesIntersection theoryRiemann surfaces