"Invariantentheorie." . . "mathematics." . . "Geometry, Differential." . . "Formy różniczkowe." . . "Kvadratikus forma." . . "Formes quadràtiques" . . "Formes quadratiques." . "differential geometry." . . "Differential invariants." . . "Differential forms." . . "Differentialform." . . "Formes diferencials" . . . . "Invariants différentiels." . . "Invariants." . . "Quadratische Differentialform." . . "Invariante." . . "Formes differentielles." . . "Formes différentielles." . "Geometría diferencial." . . "Geometria diferencial" . "Forms, Quadratic." . . . . . . "Invariants of Quadratic Differential Forms" . "Invariants of Quadratic Differential Forms"@it . "Invariants of Quadratic Differential Forms"@en . . . . . . . . . . . . . . . . . . . "Invariants of quadratic differential forms" . "Invariants of quadratic differential forms"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .