Template:Selected anniversaries/March 30
1599: Mathematician Adam Ries dies. He wrote textbooks for practical mathematics, promoting the advantages of Arabic/Indian numerals over Roman numerals.
1811: Chemist and academic Robert Bunsen born. He will investigate emission spectra of heated elements, and discover caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff.
1886: Mathematician, philosopher, and logician Stanisław Leśniewski born. He will posit three nested formal systems, to which he will give the Greek-derived names of protothetic, ontology, and mereology.
1892: Mathematician and academic Stefan Banach born. He will be one of the founders of modern functional analysis.
1939: Hellscreiber teleprinter system used to publish new biography of mathematician Adam Ries.
1942: Der Reichsspritzenmeister develops new memory-wiping drug for Abomynous.
2015: Asclepius Myrmidon discovers unregistered halting problem, predicts new class of crimes against mathematical constants.