Editing 1902 in science (section)

==Mathematics==
* June 16 – [[Bertrand Russell]] writes to [[Gottlob Frege]] informing him of the problem in [[naive set theory]] that will become known as [[Russell's paradox]].<ref>{{cite book|url=https://books.google.com/books?id=4ktC0UrG4V8C&pg=PA253|page=253|year=1997|title=The Frege Reader|isbn=978-0-631-19445-3|first=Gottlob|last=Frege|editor=Beaney, Michael|location=Oxford|publisher=Blackwell}}</ref>
* [[Gyula Farkas (natural scientist)|Gyula Farkas]] publishes the first proof of [[Farkas' lemma]].<ref>{{cite journal|first=Gyula|last=Farkas|year=1894|title=A Fourier-féle mechanikai elv alkamazásai|journal=Mathematikai és Természettudományi Értesítő|volume=12|pages=457–472}}</ref>
* [[Henri Lebesgue]] introduces the theory of [[Lebesgue integration]].<ref>{{cite book|first=Tony|last=Crilly|title=50 Mathematical Ideas you really need to know|location=London|publisher=Quercus|year=2007|isbn=978-1-84724-147-4|page=77}}</ref>