Editing 1933 in science (section)

==Mathematics==
* [[Andrey Kolmogorov]] publishes ''Foundations of the Theory of Probability'', laying the modern axiomatic [[probability axioms|foundations of probability theory]].<ref>{{cite book|first=Tony|last=Crilly|title=50 Mathematical Ideas you really need to know|location=London|publisher=Quercus|year=2007|isbn=978-1-84724-008-8|page=125}}</ref>
* [[D. G. Champernowne|David Champernowne]], while still a [[University of Cambridge|Cambridge]] undergraduate, publishes his work on the [[Champernowne constant]] in [[real number]]s.<ref>{{cite journal|first=D. G.|last=Champernowne|title=The construction of decimals normal in the scale of ten|journal=Journal of the London Mathematical Society|volume=8|issue=4|year=1933|pages=254–260|doi=10.1112/jlms/s1-8.4.254}}</ref><ref>{{cite news|title=Professor David Champernowne|url=https://www.telegraph.co.uk/culture/books/1353993/Professor-David-Champernowne.html|work=[[The Daily Telegraph]]|location=London|date=4 September 2000|accessdate=2011-12-02}}.</ref>
* [[Alfréd Haar]] introduces [[Haar measure]].<ref>{{cite journal|first=Alfred|last=Haar|title=Der Massbegriff in der Theorie der kontinuierlichen Gruppen|journal=[[Annals of Mathematics]]|volume=34|series=2|issue=1|date=January 1933|pages=147–169|jstor=1968346|doi=10.2307/1968346}}</ref>
* [[Jerzy Neyman]] and [[Egon Pearson]] publish the [[Neyman–Pearson lemma]].<ref>{{cite journal|last1=Neyman|first1=Jerzy|last2=Pearson|first2=Egon S.|doi=10.1098/rsta.1933.0009|title=On the Problem of the Most Efficient Tests of Statistical Hypotheses|journal=Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences|volume=231|issue=694–706|pages=289–337|year=1933|jstor=91247|bibcode=1933RSPTA.231..289N|doi-access=free}}</ref>
* [[Stanley Skewes]] discovers [[Skewes' number]].<ref>{{cite journal|first=S.|last=Skewes|title=On the difference π(''x'')&nbsp;−&nbsp;Li(''x'')|journal=Journal of the London Mathematical Society|volume=8|year=1933|pages=277–283|url=http://www.ift.uni.wroc.pl/~mwolf/Skewes1933.pdf|accessdate=2011-12-02|doi=10.1112/jlms/s1-8.4.277|archive-url=https://web.archive.org/web/20111001130128/http://www.ift.uni.wroc.pl/~mwolf/Skewes1933.pdf|archive-date=2011-10-01|url-status=dead}}</ref>