
Originally Posted by
milli360
Tranquility:
I couldn't vote for anyone else after hearing of his invention of the calculus of variables in one day.
I hadn't heard that story, what's that about?
I seem to remember that Newton's school was closed for a couple years because of the Plague, and he spent the time at home developing the calculus. He was kind of close about it--didn't even publish until decades later--so I can't imagine him sitting around telling stories about it. Maybe he told some story like the apple dropping out of tree before inventing gravity?
And what was da Vinci's theory of gravity? I tried to do a google on it, and all I got was Dan Brown.
Newton and Leibniz both developed the
differential and
integral calculus independently, though apparently Newton did it much earlier but published his findings much later. There was a heated dispute between the two on who had been first.
However, in 1696 Bernoulli published the brachistochrone problem (the description of which I failed to understand :-? ) and challenged mathematicians of the day to solve it, giving them a 6 month deadline, extended to 1 year according to Leibniz's request. Newton received the challenge on the 29th of January, 1697, at 4 pm. Before he had left to work the next morning he had invented the calculus of variations, solved the problem, and published it anonymously upon his request. Bernoulli instantly identified him as the author, saying, "We recognize the lion by his claw." I first read this story in Carl Sagan's Cosmos.
I don't know about Da Vinci's prediction of the gravitational force - I only know Kepler was the one who predicted its existence as he formulated his laws of planetary motion.
EDIT to add: Oh and sorry about the earlier typo. I wrote calculus of variables instead of calculus of variations.