Mathematical works have always favored Leibniz 's notation as the conventional expression of calculus , while Newton 's notation became unused .
His most notable accomplishment was conceiving the grand ideas of differential and integral calculus independently and simultaneously with Isaac Newton 's similar conceptions .
Mathematical works have always favored Leibniz 's notation as the conventional expression of calculus , while Isaac Newton 's notation became unused .
His most notable accomplishment was conceiving the grand ideas of differential and integral calculus independently and simultaneously with Isaac Newton 's similar conceptions .