Template:Selected anniversaries/June 19: Difference between revisions

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||1693: Mathematician Christian August Hausen born. who is known for his research on electricity.
||1693: Mathematician Christian August Hausen born. who is known for his research on electricity.


||1771 Joseph Diaz Gergonne, French mathematician and philosopher (d. 1859)
File:Joseph_Diez_Gergonne.jpg|link=Joseph Diez Gergonne (nonfiction)|1771: Mathematician and logician [[Joseph Diez Gergonne (nonfiction)]] born. He will contributed to the principle of duality in projective geometry, by noticing that every theorem in the plane connecting points and lines corresponds to another theorem in which points and lines are interchanged, provided that the theorem embodied no metrical notions.  


||1783 – Friedrich Sertürner, German chemist and pharmacist (d. 1841)
||1783 – Friedrich Sertürner, German chemist and pharmacist (d. 1841)

Revision as of 06:22, 6 April 2018