Template:Selected anniversaries/December 23: Difference between revisions
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||Pierre Jules César Janssen (d. 23 December 1907), also known as Jules Janssen, was a French astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium. | ||Pierre Jules César Janssen (d. 23 December 1907), also known as Jules Janssen, was a French astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium. | ||
||Hugo Hadwiger (b. 23 December 1908) was a Swiss mathematician, known for his work in geometry, combinatorics, and cryptography. Pic. | |||
||1912 – Anna J. Harrison, American organic chemist and academic (d. 1998) | ||1912 – Anna J. Harrison, American organic chemist and academic (d. 1998) | ||
Revision as of 12:01, 24 March 2018
1722: Mathematician and academic Pierre Varignon dies. He simplified the proofs of many propositions in mechanics, adapted Leibniz's calculus to the inertial mechanics of Newton's Principia, and treated mechanics in terms of the composition of forces.
1822: Inventor and engineer Wilhelm Bauer born. He will design and invent submarines.
1948: Mathematician Wilhelm Ackermann publishes his research on applications of the Ackermann function to detecting and preventing crimes against mathematical constants.