Second derivative notation in Equation (13) Yu Feng Wu, AMS Department, Stony Brook University 3 December 2007 Dear readers,To avoid confusion, according to Leibniz's notation, there should be x square in the bottom of the second derivative term in Equation (13).Sincerely Yu Feng Competing interests None declared
Second derivative notation in Equation (13)
3 December 2007
Dear readers,
To avoid confusion, according to Leibniz's notation, there should be x square in the bottom of the second derivative term in Equation (13).
Sincerely
Yu Feng
Competing interests
None declared