The book is about dynamics-the mathematics of how things change in time.The universe around us presents a kaleidoscope of quantities that vary with time, ranging from the extragalactic pulsation of quasars to the fluctuations in sunspot activity on our sun; from the changeing outdoor temperature associated with the four season to the aily temperature gluctuations in our bodies; from the incidence of infectious diseases such as meales to the tumultuous trend of stock prices.
本书为英文版．