EINSTEIN- UND EINSTEIN-MAXWELL-GLEICHUNGEN (THEORETISCHE PHYSIK); GRAVITATIONSWELLEN; SUPERALGEBREN (DIFFERENTIALGEOMETRIE); VIERDIMENSIONALE MANNIGFALTIGKEITEN (TOPOLOGIE); SYSTEME GEWÖHNLICHER DIFFERENTIALGLEICHUNGEN (ANALYSIS); DIFFERENTIAL- UND INTEGRALGLEICHUNGEN DER MATHEMATISCHEN PHYSIK (ANALYSIS); EINSTEIN AND EINSTEIN-MAXWELL EQUATIONS (THEORETICAL PHYSICS); GRAVITATIONAL WAVES; SUPERALGEBRAS (DIFFERENTIAL GEOMETRY); FOUR-DIMENSIONAL MANIFOLDS (TOPOLOGY); SYSTEMS OF ORDINARY DIFFERENTIAL EQUATIONS (MATHEMATICAL ANALYSIS); DIFFERENTIAL AND INTEGRAL EQUATIONS OF MATHEMATICAL PHYSICS (MATHEMATICAL ANALYSIS)