EntityQ867522· pop 6· linked from 6 articlesWeingarten equationsSign in to saveequations used in vector calculusConnectionsInternational Standard Book NumberEntityEuclidean spaceEntityposition vectorEntitynormalEntityMathWorldEntityEric W. WeissteinEntityfirst fundamental formEntitysecond fundamental formEntityJulius WeingartenEntityErwin KreyszigEntityCategoriesDifferential geometry of surfaces