We should mention especially Sergei's uncle Mstislav Keldysh who made major contributions to complex function theory, differential equations and applications to aerodynamics.
Kami ay dapat na banggitin lalo na Daisy's tiyuhin Mstislav Keldysh na ginawa malaking kontribusyon sa mga komplikadong function teorya, kaugalian equation at mga aplikasyon sa aerodynamics.