the.com/calculus

the math that turns 'how fast is everything changing' into a single elegant answer

means A branch of mathematics that studies continuous change, using derivatives to measure rates and integrals to accumulate quantities (also, in medicine, a hard stony mass like a kidney stone).

from From Latin 'calculus,' meaning 'small pebble' — the little stones the Romans slid across counting boards to do arithmetic. The diminutive of 'calx' (limestone, chalk), it gave us 'calculate' (literally, to reckon with pebbles), and the medical sense lingers in the same image: a tiny hard stone, only this time forming in the body. Newton and Leibniz didn't call their new mathematics 'calculus' at first; the name attached later, a quiet nod to those ancient reckoning stones.

name origin
Latin for pebble, used for counting
twin inventors
Newton and Leibniz feuded bitterly over credit
infinitesimals
Once called ghosts of departed quantities
everywhere
Powers physics, economics, and rocket trajectories
dental cousin
Hardened plaque on teeth shares the name
for instance

newton-leibniz controversy — 17th century dispute over who invented calculus first, nearly split the scientific community

leibniz notation — the dy/dx symbol system still used in calculus today, credited to gottfried leibniz 1675

newton's fluxions — newton's version of calculus developed 1665-1666, used dot notation instead of leibniz's

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