Schmidt's combining of diverse optical elements ( a special mirror, a diaphragm at a particular location, and a " correction plate " ) into a simple catadioptric system, based on reasoning from first principles, was epoch making.
12.
Previously, Sergei Sobolev used mollifiers in his epoch making 1938 paper, which contains the proof of the Sobolev embedding theorem : himself acknowledged Sobolev's work on mollifiers stating that :-" " These mollifiers were introduced by Sobolev and the author . . . " ".
13.
It is because of this, Mr . Thomas T . Burrow, a Sanskrit scholar from England ( later Boden Professor of Sanskrit at the Oxford University and the joint author of the epoch making Dravidian Etymological Dictionary ), took keen interest in attending his Sanskrit classes at Annamalai University.
