Hence, diffraction patterns usually have a series of maxima and minima. So repetitive local stress maxima and minima could be detected during solute drag creep. Finding the extrema of functionals is similar to finding the maxima and minima of functions. Finding global maxima and minima is the goal of mathematical optimization. Derivatives are frequently used to find the maxima and minima of a function. This technique has been especially valuable for identifying glacial maxima and minima in the Pleistocene. It rides on the same platform as the Infiniti QX60, Altima, Maxima, Murano and Quest. Some of these maxima even correlate well with salinity extrema. It is exported as the Nissan Maxima and Nissan Cefiro to certain markets. The J31 Teana also follows the same chassis number pattern as the Nissan Maxima (J30). Much of the exterior styling seems to draw familiar traits from the Nissan Maxima. Each version of the Quest rode a platform derived from that of the Nissan Maxima. It has the appearance of a red powder with an absorbance maxima at 518 nanometers. The I30 shared the 3.0-liter "VQ30DE" V6 engine producing with the North American Maxima. Winter maxima average , with summer maxima averaging .