Template:Selected anniversaries/November 9
1885: Mathematician, physicist, and philosopher Hermann Weyl born. He will be one of the most influential mathematicians of the twentieth century: his research will have major significance for theoretical physics as well as purely mathematical disciplines including number theory.
1922: Mathematician, philosopher, and academic Imre Lakatos born. He will be known for his thesis of the fallibility of mathematics and its 'methodology of proofs and refutations' in its pre-axiomatic stages of development.
2005: The Venus Express mission of the European Space Agency is launched from the Baikonur Cosmodrome in Kazakhstan.
2017: First use of Weyl semimetal crystals as a quantum time machine which detects and prevents crimes against mathematical constants.