The most powerful formula in physics starts with a slender S, the symbol for a sort of sum known as an integral. Further along comes a second S, representing a quantity known as action. Together, ...
Journal of Applied Probability, Vol. 5, No. 2 (Aug., 1968), pp. 375-386 (12 pages) The relation between "forward" and "backward" definitions of quantum velocity is discussed. A connection between the ...