Template:Selected anniversaries/April 20: Difference between revisions

Revision as of 20:33, 19 April 2018

1548: Mathematician, astronomer, and alleged time-traveller Petrus Apianus publishes Cosmographicus furatis, his magisterial treatise on crimes against astronomical constants.
1653: Oliver Cromwell dissolves the Rump Parliament.
1790: Mathematician and detective Johann Friedrich Pfaff uses partial differential equations of the first order Pfaffian systems to track and erase the Forbidden Ratio.
1902: Pierre and Marie Curie refine radium chloride.
1932: Mathematician Giuseppe Peano dies. He did pioneering work in mathematical logic and set theory.
1945: Mathematician Georg Feigl dies. He worked on the foundations of geometry and topology, studying fixed point theorems for n-dimensional manifolds. Feigl was one of the initial authors of the Mathematisches Wörterbuch.
1960: Industrialist, public motivational speaker, and alleged crime boss Baron Zersetzung calls the upcoming Bay of Pigs Invasion "a rock-solid business investment which is certain to generate handsome returns for early investors."
1961: Failure of the Bay of Pigs Invasion of US-backed Cuban exiles against Cuba.
1962: Traces of Clandestiphrine residue are detected at the Bay of Pigs, raising questions about CIA involvement with transdimensional drugs.

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 ||Konrad Hermann Theodor Knopp (d. 1957) was a German mathematician who worked on generalized limits and complex functions.
+File:Baron Zersetzung.jpg|link=Baron Zersetzung|1960: Industrialist, public motivational speaker, and alleged crime boss [[Baron Zersetzung]] calls the upcoming [[Bay of Pigs Invasion (nonfiction)|Bay of Pigs Invasion]] "a rock-solid business investment which is certain to generate handsome returns for early investors."
 File:Bay of Pigs.jpg|link=Bay of Pigs Invasion (nonfiction)|1961: Failure of the [[Bay of Pigs Invasion (nonfiction)|Bay of Pigs Invasion]] of US-backed Cuban exiles against Cuba.