[2] Radivoje Kašanin is regarded as a talented mathematician and scholar of natural sciences with a wide scientific culture.
As for his profound and diversified knowledge in many areas of mathematics, mechanics, and astronomy he could be considered as Serbia's last encyclopedist.
Radivoje Kašanin achieved success in many fields of his profession: theory of differential equations, the theory of complex functions, analysis, geometry, interpolation and approximation, mechanics, astronomy and geophysics and in each of mentioned fields of his work he published papers that were widely acknowledged.
He was immediately sent to the Russian front, where he survived the hostilities and by the end of the war, he went to Paris to pursue his higher studies at the Sorbonne in 1921.
From 1 October 1957 to 12 January 1959 Radivoje Kašanin served as deputy vice-president of the Serbian Academy of Sciences.