What type of details about walter dubislav can be gathered from the following bio? Bio: walter dubislav -lrb- 20 september 1895 -- 17 september 1937 -rrb- was a german logician and philosopher of science -lrb- '' wissenschaftstheoretiker '' -rrb- . after studying mathematics and philosophy , he attained a doctorate in 1922 with '' contributions to the theories of definition and proof within mathematical logic '' -lrb- '' beitrage zur lehre von der definition und vom beweis vom standpunkt der mathematischen logik aus '' -rrb- . in 1928 he became a private lecturer in philosophy of mathematics and the natural sciences at the technical university of berlin and from 1931 was '' professor extraordinarius '' -lrb- '' auerordentlicher professor , ao . prof. '' -rrb- . in 1936 he emigrated to prague . he was joint founder -lrb- with hans reichenbach and kurt grelling -rrb- of the ' berlin society for empirical -lrb- '' later : scientific '' -rrb- philosophy ' -lrb- '' berliner gesellschaft fur empirische philosophie '' -rrb- , which , along with the vienna circle , is one of the points of origin of logical empiricism . the founding members of the berlin circle were listed as sympathisers within the vienna circle . dubislav focused on a logical and mechanistic foundation of mathematics and physics , influenced by bernard bolzano 's '' theory of science '' -lrb- '' wissenschaftslehre '' -rrb- . he presented a formalised account of gottlob frege 's theory of definitions .
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