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Italian mathematician, physicist & astronomer Joseph-Louis Lagrange was born #OTD in 1736.

Because of his significant contributions in such areas as the calculus of variations, celestial mechanics (including the 3-body problem), & the propagation of sound, he soon established a reputation as one of the greatest mathematicians in Europe. In 1766 Lagrange succeeded his academic adviser, Leonhard Euler, as director of mathematics at the Berlin Academy, where he would stay for the next 2 decades.

Lynn Conway, electricial engineer and computer scientist, co-architect of the VLSI design revolution, and transgender activist, was born #OTD in 1938.

She invented Dynamic Instruction Scheduling at IBM, but IBM fired her when they learned she was transitioning.

Photo: Lynn Conway

RT @[email protected] #OtD 28 May 1871 the Paris commune, widely considered the most significant early working-class uprising for socialism, was crushed after a massacre of thousands of people to regain the city. Learn more in this compilation of writings by participants: https://shop.workingclasshistory.com/collections/books/products/voices-of-the-paris-commune 🐦🔗: https://twitter.com/wrkclasshistory/status/1662760852166963202

#OtD 28 May 1926 famous Chilean communist martyr and pharmacy worker, Ramona Parra, was born. When she was 19, she was killed in the Bulnes Square massacre by police, alongside five other workers who were protesting against rising prices https://libcom.org/history/articles/anarchism-in-chile

#OtD 28 May 1913 thousands of @[email protected] dockers in Philadelphia won their 2-week strike for higher pay and union recognition. Local 8, led by Ben Fletcher, was probably the most ethnically integrated union in the country at the time. More in our podcast: https://www.patreon.com/posts/e73-ben-fletcher-82454438

#OtD 28 May 1946 workers in a variety of industries in Rochester, NY, launched a general strike in support of nearly 500 municipal workers who had been sacked for forming a union. They won reinstatement and recognition of the union https://libcom.org/history/1946-general-strike-rochester-new-york

#OtD 28 May 1948 the National Party won a whites-only election in South Africa and began to institute their racist policy of apartheid. It took decades of struggle, mostly by the country's Black working class, to defeat it

#OtD 28 May 1936 32,000 workers occupied the Renault plant in Paris. 100,000 more workers soon occupied every major engineering factory around the city. A strike wave swept the country, involving 2 million workers in 12,000 strikes and occupations https://libcom.org/library/birth-weekend-popular-front-michael-seidman

#OtD 28 May 2013 during Turkish Occupy Gezi park protests, the "woman in red" was pepper sprayed. The photo became one of the iconic images of the movement and the police violence in response to it

#OTD in 1891, the future Nicholas II survived an assassination attempt during a state visit to Japan in what became known as the Otsu Incident. Nicholas was scarred for life by the attack. While he told Emperor Meiji that he bore no ill will after the attack, as tsar, Nicholas would go to war with Japan. If Nicholas had died in 1891, it's possible that his more liberal brothers George or Michael would have been more moderate rulers willing to embrace democracy. https://www.youtube.com/watch?v=40YSh-QisOE

Remembering Judith Resnik, who died #OTD in 1986 aboard #SpaceShuttleChallenger. Judy wore this flight suit on her way from Houston to Cape Canaveral ahead of her mission on #Challenger #STS51L. She left it with her things in the astronaut quarters, and it was returned to her family after #ChallengerDisaster. Her family donated it to the Johnson Space Center Visitor Complex where it can be seen today.